Cooling Fans Inop

CARAMAN

MEMBER
DODGE

Cooling fans inop when above normal temp.
Fans verified good by connecting directly to battery.
Removed and tested engine coolant temp sensor - at 200 degrees, 800ohms - good
Fuse good
Didn't see a relay

Any ideas?

4 Replies

PEPPERMRJ

MECHANIC
1,158 POSTS

How bout a year, model, engine, and mileage. There be a relay there somewhere my friend.
Post back. :)

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Wednesday, February 15th, 2006 AT 4:49 PM

CARAMAN

MEMBER
2 POSTS

99 Dodge Caravan, 3.3 liter engine w/ 105k miles

I replaced all 3 relays underneath the dashboard, no change.
I started replacing relays in the PDC in the engine compartment, no change. I also verified the operation of each relay in the PDC by testing its primary function (horn, wipers, fuel pump, etc) and they all work. The only thing I can find specifically identifying the radiator fans is a 40-A fuse in the PDC.

The schematic shows a relay between the PCM and the fans, but I can't find it anywhere in the vehicle.

Bought an OBDII reader to look further.

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Wednesday, February 15th, 2006 AT 5:53 PM

PEPPERMRJ

MECHANIC
1,158 POSTS

I checked my book. It says to test the relay but does not identify its location.
Ley us know what you find.

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Wednesday, February 15th, 2006 AT 6:20 PM

LITTLESCHIPPER

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3 POSTS

I had the same problem on my '92 Grand Caravan. All the relays were fine, I took it to the dealer and it was a blown fusuble link. Check continuity in the wiring.

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Thursday, April 6th, 2006 AT 1:27 PM