Chrysler Repair: 97 T & C overheating, upper radiator hose, coolant temp

Question
I have a 97 T & C we have replaced the fan control relay and the thermostat and it is still overheating. I was told if you turn the ac on and the fan doesn't turn on it is the relay. That doesn't work even after replacing the relay. Is there a thermocoupler on the cooling system in this van ?

Answer
PS Did you check the 40 amp fuse in the power distribution center under the hood near the battery? I believe it is in the #24 slot?

Hi Steve,
I would try jumping directly to the fan motors to see if that might be your problem. The actuation of the AC should cause the fan to come on, particularly if the compressor works; if the compressor doesn't work then I am not certaint he fan would come on. The dark green wire to the fan is what needs to show 12V to check the function of the motor. Without the AC the coolant temp sensor is what tells the powertrain controller to activate the relay to start the fans. So I would check whether there is or isn't 12V on the dark green fan wire when you are overheating. Then I would check to see if the resistance across the coolant temp sensor is down to below 1,000 ohms, and if not, then your sensor may not be working. It is located near the thermostat housing (follow the upper radiator hose to the engine to find the sensor nearby).
Roland