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What could be reason radiator fans are still not working on 2000 Grand Prix GT after changing thermostat coolant sensor checking relays and fan motors and finally replacing water pump with no luck?
Wiki User
∙ 14y ago
2000 Grand Prix GT Fan Not working
There are two fuses for the fans.
COOL FAN1, 30A fuse for the Engine Coolant Fan Motor (LH).
COOL FAN2, 30A fuse for the Engine Coolant Fan Motor (RH)
The above two fuses are ok.
Follow the following procedure to check.
make sure if my explanation matches your vehicle when you note and if it does not match then do not proceed.
* remove the COOL FAN1 Relay * mark the terminals on the note book. * Relay coil terminals are 86 and 85, terminal 86 of the relay is from the COOL FAN1 fuse, Terminal 85 is from the (PCM) Power Control Module. * Relay switching terminals are 87 and 30, terminal 87 of the relay is from the COOL FAN1 fuse, Terminal 30 of the relay is from the fan. * Does your car match the above explanation? if yes, proceed to the next step.
* Put a jumper wire between the terminals 87 and 30, be careful that you put the jumper wire on the switching terminals not on the relay coil terminals.
* Switch on the key ( ignition on), no need to start the vehicle. the fan should run at low speed. if the fans run at low speed that means the power wiring for the fans are ok. if the fans do not run at low speed then you have to check the ground for the Engine Coolant Fan Motor (RH, Coolant fan 2) and make the fans run at low speed as in the above procedure.
if the fans run as above and still the fans do not work in normal operation then that means PCM is not switching the COOL FAN Relay 1.
then the problem may be with coolant temperature sensor or the power transistor in the PCM.
you can check that too if the problem is on the sensor or with the power transistor in the PCM.
I hope your problem will be solved.
Wiki User
∙ 14y ago
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