Fuse at Power Dist OK
Resistor OK
Switch in dash OK
Fuse in panel OK

Where is the power getting lost?

Where do I look?

This is on a 97 ZJ

No automatic climate control feature. Just standard blower switch.

 

Could be the blower motor is toast. Hot wire it and see if it runs. OR the fan cage is caught on something.

 

How big a PITA is removal of fan motor?
Upside down gymnastics on the passenger floor?

BTW, no current shows at the dash multi-position switch under any mode. Does current flow through the motor before this switch? If motor is toast, this could make some sense.

(I am helping a friend on this, so I am not as familiar as with my XJ.)

 

On my WJ, there are 3 phillips screws holding it in on the bottom. On the ZJ, you may have to remove the glove box to see it.

If you don't have power to the dash switch, you may have a problem in the wiring. The way this works is power goes to the switch and several wires come off the switch and go to steps on the resistor, creating different speeds. On high, it bypasses the resistor and sends 12V direct to the motor. There is a switch on the mode control (the **** that sends air where you want it) that shuts off the blower circuit. That might be at fault.

 

Thanks. I will pick this project up next week and check the motor via hot wire and the mode switch for functionality.

We really appreciate your experience on this.

 

I just went thru a similar situation on my WJ. I lost all blower speeds but high. Okay, resistor, right? Took it out and it disintegrated in my hand and the connecter plug was welded to it with melted wires. That's caused by the blower motor pulling too many amps so I replaced the motor, resistor, and the connecter plug. I HATE splicing wires! It just gives you another spot to troubleshoot later. I had to lay on my back on the floor to solder and shrink-wrap the wires. The way I did that was to place one of my picnic benches next to the door opening and lay on that. Be very careful soldering overhead. I used goggles just in case.

BTW, I like your tagline! When in doubt, C4!

 

Thanks for the tip on using a bench to lay on.
And I like your wire joining method. It is what I always use on an automobile. Solder and shrink wrap. Just crimping butt spices creates another failure point for later frustration, given the vibration and moisture issues especially associated with Jeep life.

So far it does not look like we have melted connections. Resistor tested good and no melted connections. We replaced it anyway with another that also tested good.