Cooling fan issue

2004 PONTIAC GRAND PRIX
160,000 MILES
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LEE HARVKEY
  • MEMBER
  • 1 POST
My cooling fans will not turn on. I have changed all relays, thermostat, jumped fans and they worked and the temperature sensor. I am at a loss on what to check or why they do not work. Please help.
Apr 26, 2016 at 5:59 AM
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HMAC300
  • ✓ASE Certified Mechanic
  • 48,601 POSTS
  • ASE Certified Mechanic
Check all three relays and see if PCM is sending power to tell relays to engage.

It may be a bad connection in the fuse box to the relays. try tweaking prongs a tad and put a little dielectric grease on them. A small tube at an auto parts store cost about $2.00.
Apr 26, 2016 at 8:08 AM
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