Cadillac Repair: temp light on 86 FWD fleetwood, cadillac dealer, fan control

Question
I have an 86 FWD fleetwood.  Occasionally the temp light comes on, after stopping or idling, never while driving..  I checked the fans, both are off when this occurs.  Cadillac dealer says it the fan control module and that the relay is working OK and the fans are OK but I'm taking their word for it.  First they wanted to replace the radiator, then when I cornered them on the error in that thinking, they came up with this idea.  They want over $400 for this repair.  I am reluctant to go ahead with it based on their track record so far.  Any suggestions would be appreciated.  When the light comes on, I can shut the car off and restart it and the light stays off.
thanks
gary

Answer
Without doing the diagnostics testing on the fan control system the most likely cause would be the FAN CONTROL MODULE. This is a GUESS. Once you purchase this expensive module you CANNOT return it due to it being an ELECTRICAL COMPONENT. Therefore, You are STUCK with it.

However, it could be a fault in the battery voltage line to the FAN CONTROL MODULE or to the RELAY or a faulty relay, faulty fan, incorrect reading of the coolant sensor, ECM (computer) or numerous posible fault in the wires to and from these components.

Or you can contact me at:


meperganfortis@msn.com


for possible e-mailing of pictures of these components and a wiring schematic.


Please include all of the information, MAKE, YEAR, MODEL, and all necessary other information that you previously provided as well as the information that I just gave you when you contact me.



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