Intake heater light - First, the heater should come on every time the key is turned to the on position. Then the Engine ECM checks the coolant and intake air temp and if they are high enough, the heater shuts off. Second, the 12volt power that operates the circuit comes from the truck, not the ECM. The most common reason for the heater not to work is a loss of power ...

 
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On older trucks the grid heaters are separate units and can be replaced fairly easily with spacers if you really wanted to, but on a 97 the grid heaters are built into the intake cover. It is absolutely not worth the effort to fully delete them, just disconnect them. 1997 2500 CCLB, NV4500, 3.54s. 389k on the clock.Jul 7, 2022 ... Diagnosing a p0380 glow plug/intake air heater code on a 2001 gmc sierra 3500 6.6 duramax turbo diesel.The Air Intake Heater Relay is positioned in the cavity right below the grid heaters, which is the intake. You can access and identify the Air Intake Heater Relay by checking the passenger side through the hatch in the engine compartment. Additionally, you may find a solenoid and a fuse mounted lower under the intake hose somewhere.Mar 2, 2018 · Intake Grid Heater Light Comes On Jump to Latest Follow 2K views 11 replies 8 participants last post by Rogerram3500 Nov 28, 2020 Common causes of the P2609 code are a bad intake air heater, faulty intake air heater wiring, and PCM failure. The symptoms of a P2609 code are check engine light …The intake heater only engages on a cool engine to provide warm air to the combustion chambers so the engine will have good heat for combustion of the fuel. It makes the air more dense to allow the combustion during the compression stroke. The intake heater doesn't need to come on any other time.Air Intake Heater Info. Hey guys, porting over here from CumminsForum for some info. I own a small performance parts business for 6.7L Cummins and I have customers looking to alter/relocate the factory grid heater on their motors because of how restrictive it is. I've seen on the 6.0L motor that Ford uses a kind of a plug style air intake ...Mopar1973Man. 26034 posts · Joined 2006. #3 · Mar 31, 2010. Check the connection at the battery to see if the wires rotten off... Check the fusable links in the lead heading to the grid heaters... Check the relays on the driver side fender well for function... Check your grid heater for broken elements... Check your grid heater ground for ...Air ducts are also needed to route the warm air to the intake and electrical connections and wiring control the operation of these components. Trouble code P2609 is triggered by the PCM when it detects a performance problem within the intake air heater system. The circuit may be out of range, contain a faulty component or have improper airflow.Features. The Lifesmart Infrared Fireplace Heater brings the warmth and beauty of a fireplace anywhere in your home without needing to be installed. Using 6 quartz infrared elements to produce comfort and heat. Perfect for heating rooms in your home with its 3 heat settings 1000 watt/1500 watt and an ECO mode that maintains a constant 68 degrees.Mar 2, 2018 · Intake Grid Heater Light Comes On Jump to Latest Follow 2K views 11 replies 8 participants last post by Rogerram3500 Nov 28, 2020 Sep 16, 2016 ... O ya, I still need to check codes, but the light didn't set as its been blocked or what not through efi. 06 GMC SLT CC SB LBZ, Studded, DP ...The serial # is ALY01931. I have a few codes that come up other then AIH but will list all. - 030-248.02 - INtake heater fault. -030-819.02- monitor info incorrect. -030-821.04 - monitor voltage low. -036-172.04 - intake heater short to ground (this one was hard into monitor with serv code next to it.Jan 31, 2022 · The Lifesmart Infrared Fireplace Heater brings the warmth and beauty of a fireplace anywhere in your home without needing to be installed. Using 6 quartz infrared elements to produce comfort and heat. Perfect for heating rooms in your home with its 3 heat settings 1000 watt/1500 watt and an ECO mode that maintains a constant 68 degrees. P2605 is a diagnostic trouble code (DTC) for "Intake Air Heater A Circuit". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic for $154.99 .The symptoms of too much salt intake include water retention, dehydration and hypertension, reports SF Gate. Too much salt intake could lead to stomach cancer, kidney stones or ost...620 posts · Joined 2009. #7 · Nov 13, 2014. The check engine light is probably on because you unplugged the sensors on the intake when you removed it. The remote start is disabled any time the check engine light is on. The cycling is normal I think until the truck warms up.I love my coffee as much as the next cup (and the one after), but tolerance to its effects can be a real bummer. If you want to feel like you can outrun a cheetah again, try a brie...Jul 7, 2022 ... Diagnosing a p0380 glow plug/intake air heater code on a 2001 gmc sierra 3500 6.6 duramax turbo diesel.The intake heater grid light on the dash came on and it dos not go out. 2007 ram 2500 slt. I check the wire from the - Answered by a verified Dodge Mechanic. We use cookies to give you the best possible experience on our website. ... Intake heater isn't getting warm when the key is on.Specific conditions must be present before the heater is activated: ". • ambient temperature must be below 0 deg C (32 deg F) • engine oil temperature must be below 55 deg C (131 deg F) • vehicle power must be between 11.8 and 15 volts. • parking brake must be applied on manual transmission vehicles.Today, I took the truck to a Dodge dealer to have the ECM reflashed back to the latest OEM flash so I could eliminate the EFILive tune so I can install the Banks EconoMind inline tuner instead. 3. Since the ECM Reflash, it is now throwing the P0541 code (Intake Air Heater Control Circuit 1 Low). Obviously due to the Grid Heater Delete.76 posts · Joined 2011. #1 · Jul 30, 2011. I was driving today and the wait to start/glow plug light started flashing along with chimes. Now it's on permanently. Anyone know why that is. All other gauges read ok. No check engine light and truck starts and shuts down as normal. Any help would be appreciated.Your vehicle’s computer/powertrain control module (PCM) will store the P2609 code if it detects that either the intake air heater or its wiring has malfunctioned. Common causes of the P2609 code are a bad intake air heater, faulty intake air heater wiring, and PCM failure. The symptoms of a P2609 code are check engine light illumination and ...Thanks, 60vette. Purpose is to warm air going from the intake manifold into the engine during starting. It is on when the "Wait To Start" light on your dash is on. Cummins uses it instead of glow plugs. The colder the ambient temperature, the less willing your engine will be to start.What causes the P2605 code? The most common reason for a P2605 code to be stored is that your intake heater relay has become faulty. Other causes include: Open or shorted …Dieseler said: Needs to be colder out for the light to come on. 8 deg celcius is not cold when it gets down to freezing out will it come on. The manual says the glow heater comes on at 5c but when your testing the glow plug indicator light it should come on for between 15-19.5 seconds when you turn the ignition to G.Nov 21, 2022 · The 1999.5-2003 7.3L Power Stroke came equipped with a factory Air Intake Heater (AIH) that can be found in intake tract. The AIH is modulated by the pcm via a relay that is located next to the glow plug relay. This intake heater protrudes directly into the air stream in the cold side of the intake manifold and blocks approximately 20 percent ... Step 1 of the daignostic test: Relay Clicking: Key ON engine OFF, with scan tool , actuate the heater. The heater can be actuated by immersing the Intake Air Temp Sensor in a cup of ice/water. If you …May 18, 2015 · There can be numerous reasons/causes for this code failure. 1. Test the individual and total injector return rates now. May be damaged injector nut, tube hole, rust in threads. 2. Test the output i.e. measure the output of the lift pump and the CP3, if either are low in volume or pressure, will cause the code. 3. CODES: Fault Code: 2555. PID (P), SID (S): S070. SPN: 729. FMI: 3. Lamp: Amber. REASON: Intake Air Heater 1 Circuit - Voltage Above Normal or Shorted to High Source. High voltage detected at the intake air heater signal circuit. EFFECT: The intake air heaters may be ON or OFF all the time.The intake air heater (IAH) is located in the air inlet tube and is used to warm the incoming air to aid in starting the engine and for proper cylinder combustion. The glow plug control module (GPCM) will command the IAH on when the engine coolant temperature is below 140F. 05 Chevy 2500 CCSB.So my grid heater light comes on only if its under around 60 degrees and chimes 10 times then shuts of in a min or two..the truck does not go into any kind of limp mode.. Its usually when im on the highway when it happens but it has happened just driving around town. Its also throwing the p1223 code. Its driving me crazy and the truck seems ...When your household water heater fails, it can be a disaster. No hot water can mean no washing up, no showering and sometimes no heating either. So it pays to do your research as t...I love my coffee as much as the next cup (and the one after), but tolerance to its effects can be a real bummer. If you want to feel like you can outrun a cheetah again, try a brie...Generac Switch Nc Intake Heater 10000008988. Rating * Name Email * Review Subject * Comments * Recommended. Quick view Details. Generac Power Systems | sku: Generac, 6638. Generac 25 Degree Green 3.5 Quick Disconnect Spray Tip 6638. $8.35. Add to Cart. Quick view Details. Generac Power Systems ...The intake heater indicator on the dash came on when the ignition was switched on but then went out after about 3 seconds. Typically it would stay on for 30+ seconds or so before going off. ... and check engine light . Then you will get the IAPCV replaced (if under warranty free) for like $190 for the valve plus trouble shoot time and …RAM owners are typically alerted by a check engine light. Using an OBD scan tool, P2609 and/or P0542 diagnostic trouble codes are often present. A P2609 code indicates an issue with the intake air heater system voltage or performance and often means the grid heater bolt is failing and has lost its ability to conduct current.The intake heater grid light on the dash came on and it dos not go out. 2007 ram 2500 slt. I check the wire from the - Answered by a verified Dodge Mechanic. We use cookies to give you the best possible experience on our website. ... Intake heater isn't getting warm when the key is on.When it comes to installing a water heater in your home, there’s more to consider than just the price of the unit itself. Many homeowners are caught off guard by the additional cos...07 6.7L Air Intake Heater - to delete or not to delete. I wouldn't call myself a complete DIY'er. I do about 70% of the fixes myself, and about 20% w shops, and only if I have no other choice, do a ever go to a dealer. So, I had my computer crash about 6 weeks ago. The PCM or ECM and a fuel pump was 3500 at the dealer.In today’s fast-paced world, businesses need to prioritize customer experience to stay ahead of the competition. One way to enhance the customer journey is by implementing a well-d...I've grafted a cummins intake heater grid onto my toyota 2L engine to assist with wintertime starting. It works great and I was able to start the engine at 17 F tonight with just the grid heater, no glow plugs. ... Anyway, offhand the wait to start light stays on for about 10 or 15 seconds before going off. Then will cycle for about 3~5 seconds ...Dieseler said: Needs to be colder out for the light to come on. 8 deg celcius is not cold when it gets down to freezing out will it come on. The manual says the glow heater comes on at 5c but when your testing the glow plug indicator light it should come on for between 15-19.5 seconds when you turn the ignition to G.Specific conditions must be present before the heater is activated: ". • ambient temperature must be below 0 deg C (32 deg F) • engine oil temperature must be below 55 deg C (131 deg F) • vehicle power must be between 11.8 and 15 volts. • parking brake must be applied on manual transmission vehicles.1999 Dodge Cummins - No wait to start light. Replaced the intake heater. Intake heater solenoids. Would work for for a day and stop. Changed the temperature sensor and nothing. Disconnected the solenoid wire from the battery and reconnected it. Worked for 3 days then stopped when I replaced the battery terminals. Tested the wires.The ASPCA (American Society for the Prevention of Cruelty to Animals) is a renowned organization dedicated to rescuing and protecting animals in need. Their animal rescue process i...TWR. 1940 posts · Joined 2011. #3 · Jan 19, 2016. check the intake manifold air temperature sensor this sensor tells the ECM when to turn the grid heater on by what temp the intake is as i recall anything under 66 degrees it does not turn the heater on anything below 66 at start it turns it on the grid heater.My relays and grid heater is completely gone and if I let it sit on the wait to start light as your normally would, it throws that code. 2006 2500 5.9 G56 Megacab Laramie. BD Intake and steering brace, Banks grid heater delete, S&B intake, King dual stabilizer on 08+ front end, Rough Country 2in lift, 22x14.5 Dropstar wheels, local EFI live ...Specific conditions must be present before the heater is activated: ". • ambient temperature must be below 0 deg C (32 deg F) • engine oil temperature must be below 55 deg C (131 deg F) • vehicle power must be between 11.8 and 15 volts. • parking brake must be applied on manual transmission vehicles.Intake heater SES light Jump to Latest Follow 4K views 6 replies 5 participants last post by meyer7.3l Apr 9, 2015A.our portable gas-fired infra-red heater comes fully assembled Y and is tested at the factory for proper gas and input as stated . on the nameplate. B.ch heater is equipped with a 100% safety shutoff, push Ea button valve which will automatically stop the flow of gas in . the event the heater fails to operate for any reason. A tip overElectric Heaters / Infrared Heaters. Internet # 328753647. Model # HT1153UV. Store SKU # 1010860427. Lifesmart. 1500-Watt 3 Element Slim-Line Electric Infrared Space Heater with Front Air Intake and UV Light.Jan 31, 2022 · The Lifesmart Infrared Fireplace Heater brings the warmth and beauty of a fireplace anywhere in your home without needing to be installed. Using 6 quartz infrared elements to produce comfort and heat. Perfect for heating rooms in your home with its 3 heat settings 1000 watt/1500 watt and an ECO mode that maintains a constant 68 degrees. Re: CAT 3126B "Wait to Start" Light. « Reply #4 on: October 23, 2012, 05:05:05 PM ». Rod, Certainly sounds like a loose connection or the pre-heat relay/solenoid with the points sticking. Locate the relay. With a voltmeter, check for 12 VDC on the large wire out to the intake heater when someone turn the key on.A 6.7 Cummins Grid Heater Upgrade is a modification to the existing diesel engine in order to improve its performance and efficiency. This upgrade involves replacing the stock grid heater with one that has a higher wattage rating, allowing for more heat production during cold weather conditions. Additionally, it also increases air flow through ...Water Heater Flashing Blue Light 3/7/8 Times Meaning. Blue Light Flashing 3 Times – This indicates an open draft pressure switch that could be caused by a bad switch, blocked exhaust vent, or a weak fan. Blue Light Flashing 7 Times – Seven flashes means ther is a fault on a flammable vapor sensor.Dave B. in VA. Yes, the Dodge system does drop the alternator offline during grid heater operation. Folks who have grid delete spacers report that the truck goes through the motions of pulsing the heaters. The voltmeter will drop when the heaters were supposed to be on because the alternator is offline.Jun 20, 2014 · Grid heater light kicked on while driving. so just got the truck with 170,000 and was perfectly fine ( dealer let me take it home for a few days). Then dealer threw in a smarty programmer he had ordered for it and i set it on level one to start with. I took it down the highway and when cruising at 70 the wts light kicked on and chimed a few times. When the temperature dips, there’s nothing like the comfort and warmth that a gas heater provides. Yet, anyone who has spent any time shopping for one understands that not all heat...Food provides your body with the energy it needs to perform all of life’s basic functions, from breathing and pumping blood to more complicated movements and tasks. Even in a state...Pulled the power lead from the heater and reset power loop with ~12V showing for the circuit to the heater without heater in the loop. So, it seems the heater itself is toasted out. Next i will attempt to test the heater, any suggestion other than be careful if it works it will get hot. Jun 1, 2018 / Testing the intake manifold heater timer #10.This is a new OEM Engine Air Intake Heater Assembly. Suitable for Toyota Landcruiser HDJ80, fitted with the 1HDFT 4.2 litre 6 cylinder turbo diesel engine, built from 1/1995 to 1/1998. Also suitable for Landcruiser HDJ100, fitted with the 1HDFTE 4.2 litre 6 cylinder turbo diesel engine, built from 8/2000 to 8/2001.P2605 is a diagnostic trouble code (DTC) for "Intake Air Heater A Circuit". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic for $154.99 .Replacing a water heater can be a daunting task, but with the right knowledge and preparation, it can be a smooth process. However, there are some common mistakes that homeowners o...18 posts · Joined 2009. #3 · Oct 9, 2015. I know you have EFI Live, but for those who don't, I used a load resistor to make sure my CEL didn't come on. I deleted mine and two days later, I had a Check engine light. It was for the air intake heater, so I erased the code, installed a load resistor and yet have the CEL come back on.The Lifesmart Infrared Fireplace Heater brings the warmth and beauty of a fireplace anywhere in your home without needing to be installed. Using 6 quartz infrared elements to produce comfort and heat. Perfect for heating rooms in your home with its 3 heat settings 1000 watt/1500 watt and an ECO mode that maintains a constant 68 degrees.So my grid heater light comes on only if its under around 60 degrees and chimes 10 times then shuts of in a min or two..the truck does not go into any kind of limp mode.. Its usually when im on the highway when it happens but it has happened just driving around town. Its also throwing the p1223 code. Its driving me crazy and the truck seems ...I have a 2006 Bluebird Vision with a C7 Cat giving me fits. The "wait to start" light is on constantly KOEO or engine running and the grid heater is never activated at cold start up. If I supply power and ground to the solenoid it activates and the heater works as it should, with the signal wires disconnected I have ground on one and 7.2 Volts ...OEM Mopar 5187880AC replacement Intake Heater Grid Relay for the 2006 to 2018 Dodge Ram diesel trucks with Cummins 5.9L and 6.7L Cummins engines. The intake heater grid relay regulates the current applied to the heater grid to ensure a quick start in cold weather.07 6.7L Air Intake Heater - to delete or not to delete. I wouldn't call myself a complete DIY'er. I do about 70% of the fixes myself, and about 20% w shops, and only if I have no other choice, do a ever go to a dealer. So, I had my computer crash about 6 weeks ago. The PCM or ECM and a fuel pump was 3500 at the dealer.May 29, 2013 · So my grid heater light comes on only if its under around 60 degrees and chimes 10 times then shuts of in a min or two..the truck does not go into any kind of limp mode.. Its usually when im on the highway when it happens but it has happened just driving around town. Its also throwing the p1223 code. Its driving me crazy and the truck seems ... (a) Limit water penetration through the intake to 0.07 oz/ft2•hr (21.5 g/m2•hr) of inlet area when tested using the rain test apparatus described in UL 1995 Section 58. (b) Select …Jan 23, 2012 · superman279. 2113 posts · Joined 2010. #17 · Jul 27, 2013. No start when cold (depending on what 'cold' is to you) is more likely injector related. As far as the grid heater light goes, check for codes with the key trick. '03 2500 QCLB 4x4 47RE One Piece Driveshaft. Counseling intake forms are essential tools that help therapists gather important information about their clients. These forms ensure that therapists have a comprehensive understan... SLIMLINE INFRARED HEATER – FRONT AIR INTAKE VENT UV LIGHT. MSRP $119. MODEL #HT1154UV. PRODUCT SPECS. Powerful Heating: two quartz infrared heating elements and one smart boost heating elements for faster heat up. 3 heat settings: 1,000w /. 1,500w / and ECO-maintains. a constant 68º. Air ducts are also needed to route the warm air to the intake and electrical connections and wiring control the operation of these components. Trouble code P2609 is triggered by the PCM when it detects a performance problem within the intake air heater system. The circuit may be out of range, contain a faulty component or have improper airflow.Nov 20, 2009 · Got a grid heater delete and i have a code stored in the ECM but no check engine light. 2002 Dodge Ram 2500 Sport - Stock with Edge CTS, Fass, and BD enhanced 47RE with triple disc converter. Most likely due to the ECM cycling the grid while the engine is running, and expecting to see a large draw across the battery. Air ducts are also needed to route the warm air to the intake and electrical connections and wiring control the operation of these components. Trouble code P2609 is triggered by the PCM when it detects a performance problem within the intake air heater system. The circuit may be out of range, contain a faulty component or have improper airflow.open a can of worms. essentially there have been. a few cases of the grid heater bolt breaking off and finding a home pounded into the top of cylinder 6. the belief is the bolt loosens and electrical current arcs causing it to fall off, or constant elec current arcs causing it to fall into intake.For some reason all of a sudden my intake heater is not working? Very hard to get the truck to start. The "Wait to start" light still comes on but my volts never drop to around 9-10 like the heater is on. ... My wait to start light comes on for only a very short time also. 1997 2500 Extra Cab long box 4x4, 12v bhaf, 16.5* 5" Exhaust,4kgsk w/60 ...Great for camping, fishing or hanging outside. By clicking "TRY IT", I agree to receive newsletters and promotions from Money and its partners. I agree to Money's Terms of Use and ...

A P2609 OBD-II trouble code means that the variation in the voltage to one or more of the intake air heater circuits has exceeded the manufacturer's stipulated levels. The resulting stored code results in an illuminated Check Engine light, though some models of vehicles might require multiple drive cycles, at least three, before the Service .... Movie times for jordan creek

intake heater light

Now intake heater light on dash doesnt come on for 20 secods like it use to. I am pretty sure i blow the relays. How do i test if the relay is bad? 03 CTD HO QCLB, 5 spd man, Smarty, air dog lift pump, new CP3 and injectors, aem brute force intake, cfm&intake horn, adjustable boost elbow, 4"MBRP SP, leveled w/ 315/70/17 MTZ'S, and …Industry Leading Solutions for Automotive and Light Duty Truck Applications. Leading OEM and aftermarket companies trust PTI to provide quality heating and electric solutions. Phillips & Temro’s design, manufacturing, testing and validation labs enable PTI engineers to create reliable products for your company every day.Maintaining your Rinnai water heater is essential for ensuring that it runs efficiently and safely. Here are some tips to help you keep your water heater in top condition: The firs...I couldn't tell any difference with or without, except for the SES light and battery draw. Maybe if it got real cold here, or if I get somewhere really cold ...Test the High-Pressure Relief - This is fairly simple with an advanced scan tool. Just command the regulator up to achieve max fuel pressure. This should be somewhere around 27,500 psi. The relief valve is a calibrated mechanical spring that opens to return fuel back to the fuel filter, thus limiting max fuel pressure.1935 posts · Joined 2008. #6 · Jan 3, 2015. i see you are in texas, you do not need the heaters, the heaters are a epa thing to reduce white smoke at startup. the truck will start at 25* below zero without them. the industrial 5.9's do not have them. 063500dually4X4qcg56,dynatrac,bd exhaust brake,donaldson …DTC P0541 stands for “Intake Air Heater “A” Circuit Low,” and it’s logged when the PCM detects a problem with your vehicle’s intake air heater. Bad intake air heaters and relays, a faulty PCM, and wiring problems are some of the issues that could trigger the code. Common indicators of code P0541 include a lit check engine light, a ...1425 posts · Joined 2012. #1 · Dec 8, 2012. So I'm going to be deleting my intake air heater, and I'm not sure what to change. Under the engine calibrations and the intake heater section, there is a: intake heater timer (IAT), intake heater timer (ECT), intake heater timer (Baro), intake heater key-on disable and intake heater time allowed.Jul 7, 2022 ... Diagnosing a p0380 glow plug/intake air heater code on a 2001 gmc sierra 3500 6.6 duramax turbo diesel.This system will operate when the sum of coolant temp and inlet air temp is less than 109* F. Make sure to wait to start until the intake air heater light goes out. The easiest way to see if the heater is working is to pull the air intake pipe off of the intake manifold. You should see the heater grid glow red like a toaster when the light is on.i have fl 8o with 3126 intake heater light will stay on or keeps coming on draining my alternator. Answered in 6 minutes by: Technician: Cat Man. Hi. Thanks for using JA! I will try and help you out. The most likely cause of your problem is a faulty Inlet Heater relay. I have seen this before. The relay is located on top of the engine and ...Electric heaters are a convenient and efficient way to keep your home warm during the colder months. However, like any other appliance, they can sometimes experience issues that re...The wait to start light doesn't stay on and it starts hard with a lot of smoke. It starts fine, no smoke if I used the engine water heater. ... On a C7 the relay is on the engines intake manifold just above the heater grid. Also there is a fuse-able link in the cable to the relay from the starter. _____ 2005 Tropical T350LX 10-31-2012, 04:20 PM ...Jan 12, 2010. Staff. #9. The ECM monitors the circuit for continuity when the intake heater isn't on as the heater will read an almost dead short to ground, and then it reads 12 volts + when the realy is on. You could probably use a resistor and make it act as the heater to get rid of the codes without EFILIVE.Heater feed posts to neg. batt. or engine grnd. show 0.9 ohm. with heater feed cables disconnected. With WTS light on, voltage at heater terminal is 10.6V, then goes to 0 after WTS light goes out. With WTS light out, engine running at idle, voltage to heater feed terminals do not return to 10.6V, or any other positive voltage, After 1 min..2718 posts · Joined 2015. #1 · Jan 30, 2019. This morning I started the truck and immediately had the check engine light come on. The code is P2609 intake heater performance. I pulled both the solenoid relays off and found the back one not connecting across the poles when excited. So I took it apart and found it burnt across the contacts.The schematics for the original control can be found in the free electronic manual, page 8W-30-48. It will give you required wire sizes and show you one option for control. The PCM used to control the grounding of the relay coils. Note that the power supply wires used to be 6 gauge. 97 2500HD Club Cab, 4x4, automatic.Pulled the power lead from the heater and reset power loop with ~12V showing for the circuit to the heater without heater in the loop. So, it seems the heater itself is toasted out. Next i will attempt to test the heater, any suggestion other than be careful if it works it will get hot. Jun 1, 2018 / Testing the intake manifold heater timer #10..

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