heater fan switch quit working 2001 Century. not a fuse problem. any ideas?

Asked by Apr 11, 2014 at 04:42 PM about the 2001 Buick Century Custom

Question type: Maintenance & Repair

switch for the fan blower will turn but does not come on.  checked all fuses- all ok.  anyone have a similar problem?

1 Answer

635

It could be that you have a bad blower speed switch (on panel below radio), or a bad blower motor. Remove the speed switch from the dash (leave wiring harness on) and while the ignition key is in the "on" position, test (with a multi-meter set on DC) for 12V voltage at the blue, yellow, and tan wire connections. If no voltage is detected, then check for continuity between the brown wire in the wiring harness and each of the other wire terminal connections on the back of the switch, as the switch is run through its speed selections. If still no voltage, the switch is your culprit, otherwise switch your focus to the blower motor. If the blower motor is found to be defective, it should be replaced as a set with the blower motor resistor.

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