Does the 03 P/U have restitors for the fan speed control like the older models? I lost the top two speeds a week ago & could smell electrical burning very strongly in the truck. Now its out completely, no blower at any speed.

Any thoughts?


Carl

Yes but not at high speed. It sounds more like the fan motor.

I would take some jumper wires and run 12 volts to the blower motor. The purple wire is the power wire and the black wire is ground. If it works then I would lean toward the blower motor resistor assembly which houses a relay that is probably bad.

Thanks guys, blower motor is working fine, I jumped it out. I found the resistor pack & it has the high speed relay built into it. Apparantly it has gotten pretty hot. Two of the wires have the insulation melted off. Thats probably what I was smelling. No blown fuses, & the wires are actually ok, no burned through. They just got very hot for some reason. I am thinking its heat transfered from the resistor pack?

68RT