Re: Mystery Voltage Draw
Hi Bob,
The diode is there to attenuate voltage spikes that the motor sends out when it is turned off. The voltage spikes can cause erroneous operation of electronics in the car. The diode should be replaced. It's a common 1N4002 diode. It needs to be installed with the correct polarity. The diode should be available from a computer or appliance repair parts store.
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