This question is pretty in-depth. I'm in the process of repairing my inop blower.

I tested the fuse first, which is fine. Then I tested the resistor, which has contiuity between all prongs and the prong going to the blower motor.

Then I removed the dash and removed the blower motor. I put the motor on my workbench and hotwired it and it came on.

So I tested the heater controls. According the Chrysler, each fan drive terminal must have contiuity with the ground terminal while the fan speed selector is in that respective position. Well, the low speed terminal has contiuity with the ground terminal in all speeds, which leads me to believe my controls are the problem. However, I believe it's more involved than that:

There's a two pin connector going to the blower motor. The first pin has a black/white wire, and the second pin has a solid white wire. The black/white wire is the feed FROM the resistor TO to blower motor. Now since each terminal in the controls is supposed to have contiuity with the ground terminal in each speed, that would mean that the black/white wiring going through the resistor into the blower motor is ground. That checks out. With the ignition on, there is contiuity between the black/white connector and a ground only when the fan speed is on.

So the white wire needs to be power. I traced the white wire and it goes directly into the fuse block. On the other side of the fuse is a black/red wire. This wire goes into the ignition switch on top of the steering column. With the ignition on, this is a switched ground. The wire right below it is hot at all times and I wiggled the wires a little and was eventually able to get barely 6 volts out of the black/red wire with the ignition on, but then it went away and went back to a switched ground. This leads me to believe there's a problem with the ignition switch, because shouldn't that black/red wire have power?

The blower motor can't run on two ground leads. Sorry for the long post. I really appreciate any input!

 

Here's the wiring diagram section of the service manual it should point you in the right direction.

http://www.4shared.com/document/VNb2r_RV/95AN_8W.html

 

Well, ignition switches do go bad or wear out...and they're not that expensive. Can you run a fused power wire from your battery or another hot source to test your conclusion about the wire on the ignition switch?

 

Thanks for the diagram. It appears that my conclusion may be correct because according to the diagram, the wire that's a switched ground needs to have power.

I'll temporarily rewire the white wire to a known power source to see if the blower works.

I don't suppose anyone has a pinout diagram for the ignition switch?

 

The FAQ has the Full Factory Service manual has everything you need. You can download it.