I've got a 2000 Oldsmobile Silhouette, V6, 3.6 liter, 125k miles. I noticed the high side cooling fan doesn't kick in. I replaced three relays that I could find that was showed they was tied to the fan. Two were a 3x3 relay and one was a 2x3. That didn't take care of it. I finally replaced the whole cooling fan. I still can't hear the high side fan ever kick in. As long as you're just normal driving, it cools the engine well, but when you're in traffic, with less air flow, the temperature gauge does get warmer than normal. When I see that, I turn on the AC and it makes the AC cooling fan kick in and cools the temp back down. Is there anything I can test or do to try to get it back to normal operation? Thank you for any help you can offer
The parts cannon approach rarely if ever works. The items you replaced should have been tested first, they were probably good.
I'd check to see if there is a separate temperature sensor for the fan. If so it may be bad.
Do you mean the coolant temperature sensor or would there be another one?
Every part I replaced was stock parts, so I didn't feel bad about swapping them out considering they were 23 years old. Lol.
I'm not familiar with your car, but some have a dedicated temperature sensor for the cooling fans.