i have replaced the temp sender on the front of the manifold and replaced the relay next to the battery and still overheating. it is 5.0 tpi single fan set up. i have read for hours on all the posts great stuff but i need individual attention. HELP i dont want to bring it to a mechanic.

 

Have you made sure the fan even works with straight +12v ?

It (the fan) should run if you unplug the switch on your (pass side frame rail) A/C line or, if you jump the A-B terms on the ALDL plug.

The circuit is fairly simple...

 

yes the fan does work.

 

Test the tan/white for +12v Key on. If good,
backprobe the green/white wire and ground, key on.
The relay should switch and fan should run.

 

in the attatchment the always hot wire does that come right off of the battery?

 

I believe it should be on a fusible link, on the battery lug, at the starter.

 

i have a wire about 10 or 12 guage that comes right from the battery that has been cut or worn open. also does the Air conditioning harness connected up by passenger side fire wall need to be connected? previous owner has that harness disconnected

 

The main battery cable should have had a wire like that going to the lug on the back of the alternator.

The switch with the blue/blk wire on it is what sends the A/C request. The other wiring is for the compressor clutch.

When you unplug the blue/blk switch, the circuit is now open (normally closed) and the ECM should ground the fan relay (key on).

 

there was a smaller wire other then the one that goes to the alternator. connecting the wire through seems to have fixed it. i have always wondered about that wire i just hate connecting wires that look like they have burned open....stay tuned .