If it doesn't work on any speed including high it is more likely the motor itself. On high the resistor is bypassed and the blower gets full power. I would check fuse 34 and fuse 27 first. A quick test for the run relay is if you have the aux. Real heater, if it works the relay is good. Use a test light to be sure you have power at both sides of the fuse then unplug the wiring at the blower resister and check for battery voltage on terminal G the Red wire with black stripe. If you have power there but no blower on high then test the blower motor itself by applying battery voltage to the Red terminal and grounding the other. If the blower works check that the Black wire has a good ground, they have a bad habit of failing.
Removing the blower and resister is easy, they are in the passenger foot-well. Remove the blower first, then loosen the rear screws on the resister and remove the front one The rear ones are slotted. Two common issues with them, the blower motor starts to fail and the higher current burns the relay contacts or the resister or the ground fails.
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Sunday, December 15th, 2019 AT 5:39 PM
