Fan switch Help!!

[Rudy913]

Gbody fan switch won’t work on high
This my second time changing it
I clean all the connection even tho they wasn’t in bad shape but still nothing
Anybody have this similar problem this the switch I had in it before

 

[Canon_Mutant]

I don't have my brains handy [my manual] but I recall there is a relay that has to flip in order to work on high . . . the difference between going through the resistor block and just straight to the fan. Sadly this is over [what] behind the accumulator I think?

 

[Canon_Mutant]

I can check for sure tomorrow evening but it seems that relay is like [under the hood] behind the AC accumulator between it and the blower motor.

 

[Wageslave]

Oooh, oooh, I have had a problem like this before. On the fan motor, there will be a thick Purple wire that powers the fan. This is the B+ to the motor. There is a bare ground strap that goes to the fender as a body ground. Where this bare strap screws to the motor, there is a male spade terminal that has a thick Black wire attached. If this thick Black wire is disconnected, the fan will run in all speeds but high. It could possibly be a coil ground for a high speed relay if there is one equipped.

Check to make sure this wire is connected and the connection point is corrosion free. Hopefully others can chime in with the Black wires exact purpose.

 

[fleming442]

That and make sure the high relay has power. It's fed from a fusable link at the starter

 

[Rudy913]

Oooh, oooh, I have had a problem like this before. On the fan motor, there will be a thick Purple wire that powers the fan. This is the B+ to the motor. There is a bare ground strap that goes to the fender as a body ground. Where this bare strap screws to the motor, there is a male spade terminal that has a thick Black wire attached. If this thick Black wire is disconnected, the fan will run in all speeds but high. It could possibly be a coil ground for a high speed relay if there is one equipped.

Check to make sure this wire is connected and the connection point is corrosion free. Hopefully others can chime in with the Black wires exact purpose.

Thanks I thought it would be simple
But this is not the factory engine I have in
And who ever change it must have not connected the wire
I guess I will have to live without it not until I get someone to check it out . It’s to many wires for me

 

[pontiacgp]

There is a 10 gauge red wire that feeds this (yellow circled) relay which is the feed for the high speed. There is a connector on the passenger sided near the front of the valve cover that has the red wire. As fleming442 that red wire comes from the fusible link attached to the B connection on the starter. It is hot all the time.

 

[84GP455]

It could, may also be the blower motor resistor which is connected to where the blue, brown, yellow and green wires are, which look a little corroded.

 

[Rudy913]

There is a 10 gauge red wire that feeds this (yellow circled) relay which is the feed for the high speed. There is a connector on the passenger sided near the front of the valve cover that has the red wire. As fleming442 that red wire comes from the fusible link attached to the B connection on the starter. It is hot all the time.

View attachment 76333

I found the red wire
After I slice it where do I run to to ?

 

[Rudy913]

It could, may also be the blower motor resistor which is connected to where the blue, brown, yellow and green wires which look a little corroded.

This the resistor The brown it just grease but it looks clean