Radiator fans wont work.

Okay so out of no where my radiator fans quit working. So i replaced the Aux fan switch on the radiator with no luck then bought another switch just to verify still no luck. now ive replaced both fans and yet still nothing. The fans will turn on if my ac is on but no luck other then that. could the be the Fcm?
I moniter my temp thru my scanguage and my assumpion is at 195+ fans turn on.

Let it run a little hotter and see what happens, like 210-215.

I

Nothing i was at 220 earlier and still nothing. It was a lot of stop and go traffic,so i hade my heat on full blast to keep the temps down.

Wiring or the FCM.

What about the engine Temp sensor? I'm not looking at the schematics, but as I recall, the Temp sensor provides to bits of out put data. One bit of data goes to the Temp gauge in the Cluster. The other bit of info goes to the ECU. The ECU is "wired" to/with the FCM..........so go figure!

If the FCM is working with the AC, it should be okay otherwise. Although, I do admit, I have had two bad "new" FCMs!....no doubt at all!

Hmm i do have a spare temp sensor i can throw it in and give it a try.

AndyBees said:

What about the engine Temp sensor? I'm not looking at the schematics, but as I recall, the Temp sensor provides to bits of out put data. One bit of data goes to the Temp gauge in the Cluster. The other bit of info goes to the ECU. The ECU is "wired" to/with the FCM..........so go figure!

If the FCM is working with the AC, it should be okay otherwise. Although, I do admit, I have had two bad "new" FCMs!....no doubt at all!

Click to expand...

Okay update I was doing some investigation on my scanguage and I did happen to notice two tempaure differences one was the standard temp guage for any car and the other is my special code which reads the engine temp sensor, and I have discovered that the engine temp sensor was at 187 while the Standard guage read 215+ and the transmission temp was at 213 so possibly my temp sensor may have been faulty now time To perform some real world testing.

I heard if the car is running hot, instead of putting heat on, the ac on will spin both fans which will bring down temperature. just a thought

The engine temp sensor solved all my proublems!!