. sorry for the delay............
.Greetings...... "Hi, I'm Don (aka MOLurch) and I look forward to helping you!".
Typically this is caused from the PCM. Use of Dealer DRB Scan Tool is needed to test.The PCM gets a signal from the Engine Temperature SensorThe PCM then turns on the "Low Speed Fan Relay" or the "High Speed Fan Relay", depending on the Engine Temperature.see diagram
The PCM supplies a Ground - to the Relays to activate them
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what does the PCM stand for, and can I buy it? Sorry if this is a dumb question. I'm trying to learn about my car.
PCM = Powertrain Control Module This is the Engine Computer, that activates a number of components.Fuel Pump, Injectors, Ignition, Fan, etc.