Cooling fans not working

Tiny
DCMANNIN
  • MEMBER
  • 2002 PONTIAC MONTANA
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 131,200 MILES
My cooling fans will not engage. I have replaced the relays in the main fuse block, if I use a jumper wire in the fuse block where the relay is the fan runs. Not sure if there is another relay. Any Ideas? The two relays I replaced were aux engine cooling fan relay and radiator cooling fan relay.
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Tuesday, June 3rd, 2008 AT 8:54 AM

2 Replies

Tiny
RASMATAZ
  • MEMBER
I have seen this problem before it ends up being the PCM fan control driver has gone out making the fan run only when the AC is on. I would get a used one because new will require to be reprogrammed wich will cost about $130.00. Here is the PCM location below.

Check out the diagrams (below). Please let us know what happens.

Cheers
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Tuesday, June 3rd, 2008 AT 9:08 AM
Tiny
KRISTENLEE
  • MEMBER
This post is spot on! Fixed my car with a used PCM I got for $120.00. All fixed. ;)
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Monday, July 23rd, 2018 AT 1:08 PM

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