fresh air blower, where's the hot lead? Options

[jr91472]

Didn't want to hijack and my issue is a little different so........

Can someone explain to me where the hot lead is located on the fresh air blower switch in the dash. All I can find is one red wire that goes into a small lamp socket next to the dash board lever.

I have three white wires (w/ stripes) that control the fan speed. Then one ground wire on top of the switch unit and another ground wire on the bottom.

This seems consistant with the wiring diagram, but I cannot figure out how this circuit works. The only place I can find 12v is if I pull the lamp socket out and probe at the end of the red wire. Once I put the lamp socket back in place, nothing. Is there some kind of contact inside the lamp socket?????

btw, the little light bulb is burned out, don't know if that matters or not.

thanks

[Joe Ricard]

Well it's one of the 4 wires on the plug. You can be brave and lift the cover off the plug and see which ones the red wire is hooked to. Just be careful not to let the wires come out of the connector or you will goe nuts figuring out which one goes where again.

Did you see if the motor / squirrel cage fan spins freely? If it doesn't don't bother hooking power to it. just pull the unit and fix it.

You can jumper a 12v wire and a ground negative wire straight off a car battery. Worse that can happen is you run the motor backwards. suck instead of blow at one of 3 speeds.