How to fix blower, only has off and high

[Wade Lippman]

My 99 blower is off until you turn it to high; then it comes on as high.
How do I fix this?
My rear blower works fine; though no one ever sits back there. Any chance of swapping something between them?
Thanks

 

[Doubt Incarnate]

not sure about swapping stuff. but the speed is controled with resistors. you might be able to take your switch apart and get new ones a radio shack, i dunno if you have to buy the whole switch elsewhere.

 

[budwich]

The rear motor only uses a single resistor while the front has three.

 

[thewishkah]

Its your resistors, the blower motor uses 3 and it goes like this 1low 2medium and high the motor bypasses the resistor so since yours only work on hi its 99% your resistor, the resistor is located just to the right of the blower motor (lookin at the fire wall from the front of the vehicle) good luck, Jon

 

[DeRocha]

Classic resitor pack failure... The resitor is used like the filaments in a 3 way light bulb to vary power thus creating the low med high blower speeds... Max by-passes the resistor pack and sends full power to the blower so a blower only working on max is a tell tail sign the resistor pack is fried.

 

[gijoecam]

I had the same symptoms and though it was the resistors. Boy was I wrong:

Replacement pigtail was $15, resistor pack was $13. The connector is not sealed against the elements. I siliconed the outside of the new connector where the wires enter it, and used dielectric grease inside the connections. Been workin' great ever since!

-Joe