Fan switch Help!!

[pontiacgp]

It might be eas

The red wire on the valve cover is the hot wire for the electric choke, I believe.

the choke wire is blue and 16 gauge I think

 

[fleming442]

the 5 pin relay is wired with all red wires, slightly confusing to figure out what each wire is for....

Even scarier: it might be a "replacement" high speed blower relay....😱

 

[Longroof79]

I've had the same problem on several occasions over the years. Check the plug connector over the right side valve cover. I'll bet there's one corroded terminal. Buff up the terminal(s) with either a small file or a small piece of rolled up sandpaper.
It's pretty common on our cars.
I've never had a problem with the resistor or relay even though I replaced both.

 

[O. D. Showtime]

I've had the same problem on several occasions over the years. Check the plug connector over the right side valve cover. I'll bet there's one corroded terminal. Buff up the terminal(s) with either a small file or a small piece of rolled up sandpaper.
It's pretty common on our cars.
I've never had a problem with the resistor or relay even though I replaced both.

We had the same problem from time to time on my son's Malibu...clean up the terminals and it was good to go..

 

[Wageslave]

the choke wire is blue and 16 gauge I think

Could be. Mine is Red with no stripe, but my harness has also been butchered. Like lamp cord in places type butchered.

 

[pontiacgp]

Could be. Mine is Red with no stripe, but my harness has also been butchered. Like lamp cord in places type butchered.

this is the replacement connector for the quadrajet choke on a G body engine

 

[rcs0296]

View attachment 76302 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

high fan goes thru a relay not the switch and resistor

 

[Rudy913]

Still haven’t found the wire which sucks
I wish y’all live closer

 

[pontiacgp]

I just remember a couple of summers ago I thought I had a problem with the switch and put a new one in but that did not fix the problem. It turned out to be the other switch that was defective. It wasn't reading the selection properly and would shut down the fan. I could not find a replacement at any of the stores so I got one out of a car at the wreckers...

 

[Rudy913]

I just remember a couple of summers ago I thought I had a problem with the switch and put a new one in but that did not fix the problem. It turned out to be the other switch that was defective. It wasn't reading the selection properly and would shut down the fan. I could not find a replacement at any of the stores so I got one out of a car at the wreckers...

View attachment 78309

I finally fix my fan problem today
Everybody thanks

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.

i finally got my fan speed blowing on high
Thanks everybody for y’all help. I splice into that purple wire and ran it to a hot wire that turn off when the car is off .