CGT cooling fan problem?
JOlson1967 at aol.com
JOlson1967 at aol.com
Sun Sep 10 23:40:14 EDT 2000
I looked at a '86 CGT that had this problem:
The cooling fan would not come on with the car running and it would
subsequently overheat. Neither would the fan come on when the a/c switch was
turned on.
However, when the ignition was turned off the fan would turn on and would
immediately stop if the ignition switch was turned back on.
The fan itself works fine but there seems to be a problem in the ignition
switch or a relay. I assume the fan thermoswitch is functioning properly
because the fan turns on when the ignition switch is turned off and the car
is hot. The fan runs for several minutes and then shuts off.
The a/c switch does not turn the cooling fan when the car is running or the
ignition switch is turned on, however the a/c does produce cool air. I
assume that when the starter is engaged, a relay is supposed to interrupt the
power to the cooling fan and then turn the fan back on when the ignition
switch is returned to the on position.
I could find no obvious electrical problems that would the fan not to turn on
when the car is running and is hot. Again, as soon as the ignition is turned
off, the fan will turn on if the car is hot.
Speculation is either a fault in the ignition switch or a relay? Perhaps the
thermostat or thermoswitch is not functioning properly? Also, why won't the
fan come on when the a/c is switched on? It should come on regardless of
coolant temperature, correct?
Any input would be greatly appreciated! Thanks!
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