Quote:
Originally Posted by dieselbenz1
The porcupine or resistor is a power transistor which is terminated at the firewall by a 3 prong plug. The 3 wires are powered, ground and control voltage. The control voltage 1 to 5 volts controls the fan speed. That's where I'd start diagnostics. On a side note check your auxillary water pump and see how much current it uses or if it even works. High current > 1 Amp will cause your CCU to do funny things.
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Thanks for the suggestions.
Is the plug for the resistor accessible to check voltages without removing windshield wiper system and the blower?
And regarding the auxiliary electric water pump, I did not know the car had one! I have a multi-meter so I should be able to check it's amperage draw. Could you tell me where approximately it is in the engine compartment? Perhaps front of the engine or near the radiator? Thanks.