Heater/AC blower not working

1998 BUICK REGAL

120,000 MILES • 3.8L • 6 CYL • 2WD • AUTOMATIC

GCLINE

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The fan switch worked intermittently at first then just on high. I have replaced the resistor and checked all the fuses now it only clicks when put on high. I have read that it can be the ignition switch sometimes. I do not want to just replace parts. What else can I check before doing that? Thanks

Aug 8, 2018 at 5:58 PM

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STRAILER

CAR REPAIR CONTRIBUTOR
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Hello,

This guide will show you how to check the power and ground of the blower motor to help determine if the problem is the fan motor or something else.

https://www.2carpros.com/articles/blower-fan-motor-works-on-high-speed-only

Here is the blower fan wiring diagrams so you can see how then system works.

Check out the diagrams (below). Please let us know what happens.

Cheers, Ken

Images (Click to enlarge)

Aug 12, 2018 at 12:13 PM