Chevy & GMC Vans

So, low and behold, the fan stopped working...Ran a jumper to the fan, it fired right up...So, I figured, it's an '93, the switch died, got one from the local donor yard, it didn't help...Oops. So, I look for current behind the switch, it's live on every lead from the switch outbound...I got the fan working on all but high position...it appears the lead is HOT. Looked all through the, I think it's a Clymer, doesn't flippin' show the heater or switch...go figure! any thoughts?
thanks
Hey, didn't there used 2 B a "burn rubber" smiley...?

Blower resistor pack. There's a how-to for replacing that somewhere in the forum.

High speed is controlled by a relay on the engine side of the firewall, just above the blower motor. Sadly, there are no aftermarket ones that will work. You MUST buy them from the stealership, about $13.

Have you checked the High Speed wiring connector coming into the blower?

Sorry, astroturf, but there are only two wires going to the blower -- one ground and one power. There is NO high-speed wiring.

Ok Thanks Squid

How about the the high speed wire to the resistor then? (from the switch)

Just guessing?

Jim

Once again, the high speed for the blower is controlled through the high speed relay located on the engine side of the firewall just above the blower motor.

Hey Squid,

Do you have a drawing?

Thanks, Jim

No, I know this from experience. I've replaced the blower motor, the fan, and the High-Speed relay. Without the relay, there is NO high speed, but the other speeds run nicely. Visual inspection will reveal that there are only two wires going to the blower motor -- the ground wire and the power wire.

Thanks Squid

Jim