Cooling Fans Not Working

SETLOCB

MEMBER
2005 CHEVROLET VENTURE
6 CYL
FWD
AUTOMATIC
69,700 MILES

My cooling fans are not working. They do work when the A/C is on. I checked all fuses, they are ok. I changed the relay's and changed the coolant temp. Sensor. What else could the problem be?

Friday, May 30th, 2008 AT 10:46 AM

3 Replies

LEGITIMATE007

MECHANIC
5,121 POSTS

Thermostat may not be opening to let the coolant rush by the engine coolant temp sensor, try a new thremostat

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Friday, May 30th, 2008 AT 2:28 PM

SETLOCB

MEMBER
13 POSTS

Thanks for answering my question. That's exactly what I just finished up with, changing the thermostat. No luck though. The fans still not working. There's not much left to check besides the PCM. Is there a way I can test that myself, or is that something I should have a garage check? Thanks again.

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Friday, May 30th, 2008 AT 8:16 PM

LEGITIMATE007

MECHANIC
5,121 POSTS

So the fans still won't come on, even when the temp gauge reaches the red area? if this is the case then yeah have a garage check the pcm.

Read these guides, they will help you figure this out

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

https://www.2carpros.com/articles/how-to-check-wiring

The wiring diagram for your cooling fans is attached below

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