OK here is what i know
Blower fan doesn't work on any speed
Have 12v to fan
Plugged in new fan tested on batt +- works fine
Will not work at connecter for old fan
12v at connector
0 volts at all 4 wires at fan speed switch
? What is wrong? What am i missing???????
Fuse good!
vacuum controlls all work
Peter B
I Have no AC!!!!!!! HELP

 

You could do what I did after I found the switch coupler melted, hard wire a on-off switch so I have all or nothing! The biggest wire is the feed and the bottom wire is the high speed setting. Hope this helps,

Jon

 

See if this helps ~ https://www.dieseltruckresource.com/...0&postcount=11



EDIT ~

 

First thing is to figure out how you can have 12V at the connector with no voltage at the switch.

I know that does not answer any of your questions. But further investigating seemingly contradictory bits of evidence often leads to root causes.

Keep going,
JP.

 

Sounds like you have no ground at the fan. Clean and retighten the RH headlight ground.

 

Cant find a ground near front pass side headlight, But installed a ground from Batt to body, still no fan
Ran a + and - from batt to old fan, it works fine that way, Havent had time to do all the tests stated above,,,, Need wiring diagram, anyone here have one on cd they can email to me?
Thank you!
Peter.

 

Check the switch. If it dosen't work at all it is usually the switch (assuming the motor is good). If it only blows one speed it is usually the resistor.(behind the glove box ~$15 @ the dealer)

 

The blower will work if wired hot to the battery,,, It works on NO speeds
And it went out all of a sudden, I dont have an extra switch, But i think i can scare one up at the bone yard, Thanks.
Peter.