Question about Dodge Ram 1500

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Radiator fan relay control circuit 2002 dodge ram

AC condenser fan not coming on.#39 fuse good,new relay and fan.need help

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  • Mashone Moses
    Mashone Moses Apr 03, 2014

    the ac blows cold when driving.

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Low charge pressure of 134A Coolant will not let the fan or compressor clutch engage.

Posted on Apr 01, 2014

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SOURCE: cooling fan relay 1998 neon

on the left(driver's) side of the lower rad support. It's a small flat relay with a plug on the bottom and usually has a blue colored front. held on by two screws. Also, there may be more rad fan relays in the underhood fuse/relay box.
Good luck.
R

Posted on Feb 27, 2009

  • 1 Answer

SOURCE: Check Engine LIght Problem code P1491

Don't rush to replace the fan itself until you have tested it. Check the fan relay and relay fuse inside the vehicle. Hopefully it will be just a failed relay and replacement ($12 at dealer) or/and an inexpensive 10amp or 30amp fuse. There can be multiple issues causing this code.

In my case, the fan relay failed (burnt). 2000 Dodge Durango. The PCM was also damaged and requires replacement, awaiting delivery. A remanufactured PCM can be purchased online for substantial less than at the dealer. We tested the fan by supplying power directly to the fan and it runs fine. We had to remove a cover (easy to remove) under the vehicle near the fan to gain access to the connector Use a fused link for testitng to prevent damage during the test. Using a multimeter, I found power 12.5volts from the 30amp fuse circuit which supplies the power for the fan, 12.5 volts from the PCM circuit with the key on, but only 5.16volts from the 10amp fuse circuit with the key on. A continuity test showed the 10amp fuse inside the fuse box inside the vehicle was good. The 30amp fuse in the power distribution box was good when tested for continuity. Checked resistance on all curcuits and they were well within limits. I also checked the wiring to the fan for continuity and resistance. After my tests were completed, a Dodge technican concluded the PCM is bad and is not grounding the circuit as it should. If you want to troubleshoot this yourself, see if your local library has access to ALLDATA which will have diagnostic information and the diagrams of the circuit involved. A Haynes manual for the vehicle, I purchased one at Autozone, can be helpful also.

Posted on Jul 27, 2009

ZJLimited
  • 17970 Answers

SOURCE: location for radiator fan control relay circuit

This relay is a common problem for Chrysler vehicles. Located in the passenger side bumper area (Jeeps). Test the fan first.

Hope helped (remember rated ths help) Good luck.

Posted on Nov 04, 2009

  • 2 Answers

SOURCE: need to find circuit/relay location for cooling fan. fuse is good, fan motor tested fine. need wiring schematic

where is the cooling fan relay located on a 92 taurus

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SOURCE: 2002 Dodge caravan 3.3L. Code P1491. Replaced with

you have an open or shorted condition detected in the low speed radiator fan relay control circuit. hope this will help!!!!

Posted on Apr 21, 2010

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02 dodge ram 1500 4.7L p1491 code Radiator fan control relay


Pretty hard to offer advice on mystery vehicles, especially since they're all wired differently.

Thanks for the extra info. Chrysler uses a digital radiator fan controller to vary the speed of the fan. Since it's digital they mount it to a frame member as a heat sink to keep it cool. When rust forms, the controller overheats and shorts out, resulting in no power to the fan. Check the fan controller as your first step.

http://ricksfreeautorepairadvice.com/car-overheats-chrysler-vehicles/

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Blown 40 amp cooling fan fuse 96 dodge caravan


code 35-Radiator fan control relay circuit-open or short detected in the low speed radiator fan relay control circuit.

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2002 dodge stratus overheating when ac is on. what else can i do to fix it?


Is your ac fan coming on when you turn on the ac? If it only getting hot when you turn ac on I'd say your ac fan isnt coming on so check your ac relay and ac fuses. Is your ac blowing cold

Jun 14, 2014 | 2002 Dodge Stratus

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My beetle 2001 radiator fan no working and aircond also come out without cool air, engin overheating problem. i send to workshop and check wiring and fuse all in good condition. please give advise what...


Because there is no supply to the fan , it is not working. So you need to check the fan with a direct link to test , is working check the RELAY box for the fan relay, next check on the thermistor, the control circuit of the temperature controller to trigger the fan relay. Also check on the fuse to the relay unit.
The AC cooling must be checked only after this circuit is working as a hot engine will not give a good result. cehck the gas pressure, check the pumping pressure to confirm the compressor.
Also the eveporator, condenser, pressure switch must be checked independantly.

Aug 08, 2011 | 2001 Volkswagen Beetle

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2006 dodge ram 1500 condenser fan not working. Where is the A C Condenser Fan fuse located?


from a TSB, wonder if your dash is cracked too?
Symptom/Condition:
The condenser fan fuse (#39) in the power distribution center may open leaving the condenser fan inoperative. This may be caused by a condenser fan with excessive current draw or by water collecting in a trough in the fan shroud and freezing in cold weather, which can prevent the fan from turning. This may illuminate the Malfunction Indicator Light (MIL).

http://dodgeram.info/tsb/2002/08-015-02.htm

ps: the water collecting is because there is no protection in the underneath of stuff in these vehicles....many many documented problems, could be they originate from the cracked dash falling inside or pulling apart and damaging electronics too...

Mar 14, 2011 | Dodge Ram 1500 Cars & Trucks

1 Answer

Code pops up p1491


radiator fan control relay circuit. If your truck does not have one, then it may indeed be called a condenser fan relay.

First...could be just the fuse. I think it's #39. Check your owner's manual for fuse chart.

If the fuse is blown, replace the fuse, then disconnect the neg. battery terminal for a minute or two. Then re-connect, start the car, and the light should go out.

Apr 06, 2010 | 2002 Dodge Ram 3500 Truck

2 Answers

Check Engine Light


It is for the radiator fan relay control circuit.It means there is a problem in the cooling fan relay circuit.Could be the relay,wiring,or the fans.Check the fuses and relay over if it looks good then you have to take it in to get it diagnosed.You need a scan tool and you also need to know how to use a multimeter.Hope this helps.Good luck.

Feb 24, 2010 | 2000 Dodge Caravan

2 Answers

Check Engine LIght Problem code P1491


Don't rush to replace the fan itself until you have tested it. Check the fan relay and relay fuse inside the vehicle. Hopefully it will be just a failed relay and replacement ($12 at dealer) or/and an inexpensive 10amp or 30amp fuse. There can be multiple issues causing this code.

In my case, the fan relay failed (burnt). 2000 Dodge Durango. The PCM was also damaged and requires replacement, awaiting delivery. A remanufactured PCM can be purchased online for substantial less than at the dealer. We tested the fan by supplying power directly to the fan and it runs fine. We had to remove a cover (easy to remove) under the vehicle near the fan to gain access to the connector Use a fused link for testitng to prevent damage during the test. Using a multimeter, I found power 12.5volts from the 30amp fuse circuit which supplies the power for the fan, 12.5 volts from the PCM circuit with the key on, but only 5.16volts from the 10amp fuse circuit with the key on. A continuity test showed the 10amp fuse inside the fuse box inside the vehicle was good. The 30amp fuse in the power distribution box was good when tested for continuity. Checked resistance on all curcuits and they were well within limits. I also checked the wiring to the fan for continuity and resistance. After my tests were completed, a Dodge technican concluded the PCM is bad and is not grounding the circuit as it should. If you want to troubleshoot this yourself, see if your local library has access to ALLDATA which will have diagnostic information and the diagrams of the circuit involved. A Haynes manual for the vehicle, I purchased one at Autozone, can be helpful also.

Apr 23, 2009 | Dodge Pickup Cars & Trucks

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