Cabin fan resister #REPD191803. Fan runs with or without

Kbonk

Active member
My fan has only been working in two settings #2 & #4, changed the resister, no change in operation. I left the resister out and my operation remains the same. Anyone have any thoughts on what to check next?
 

autostaretx

Erratic Member
Speed 4 bypasses the resistor entirely.

The fact you're getting *any* slower speed with the resistor removed hints at a damaged cable harness.
(or broken switch, or weirdo ground path)

Depending upon your year, your resistor could be of either of these two hookups (usually they're the one on the left):

BlowerChoices.jpg

Where it sits in the overall circuit:

Blower.jpg

Where current goes from the resistor area itself:

BlowerResistor.jpg

In that last diagram, C220 is the feed from the REST and AuxHeater systems.. both of which will turn on the fan at (at least) the slowest setting.

--dick
 

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