Fan wires go to relay, than after relay, they go to engine temperature sensor located on the side of the block. There is another sensor usually attached to thermostat housing. This would be coolant temp sensor. You can test both sensors with an ohmmeter or multi-meter
The computer will not command the fans to come on until the coolant temperature reaches about 230 degrees. I thought I had this same problem when I purchased my C5. Upon further investigation and diagnosis, it turns out that they were functioning as designed. Check out theory and operation of the system before spending unnecessary time and money!
×
I think Mnfisherman has hit that 1 right between the eyes,,i like that name...im a fisherman also....crab
621 views
Usually answered in minutes!
If they haven't messed with a working design, the sensor should be on the intake manifold near or on the thermostat housing. Chances are it could be out of range and delaying the fan
×