I have a 1992 Jeep Cherokee Sport. My blower hasn't worked since I have owned it (about a month). The fuse is fine so I ran a hot wire to the blower motor to check it and it works fine. It just wont work inside the truck like its supposed to. I replaced the blower switch due to a broken prong, the vacuum heat control switch because it was burnt up, and I just replaced the blower resistor this morning for the heck of it. Still nothing??? I'm pulling my hair out over this thing and I'm at a loss as what to do next. I'm getting power through connector behind the heat and ac control unit. I'm not getting power at the blower switch or the blower resistors. I'm getting power into the heat vacuum switch. If anybody has any suggestions plz fire away thanks.

 

Not sure if this will help. I posted here because I had high speed fan only. After putting in a new switch I didn't get the wiring harness plugged back in all the way on the vacuum switch and lost everything. Look over all wire connections after pulling a bunch of used ones a part trying to save money. Apparently Jeep has a problem with blower motors pulling to many amps So I ended up replacing the switch, blower resistor and the motor.

 

Below is a diagram of the 1990 HVAC Bower Circuit. I don't have a '92 diagram but I'm thinking this '90 diagram applies to the '92. In '93 the wire colors changed and the diagram doesn't show a connector behind the selector switch.

Let me know if this diagram applies to your '92.


The blower motor ground (splice) is on the LH Shock tower.


The blower fuse is #5 (25 Amp) fuse in the fuse block.

Hope it helps.

 

Thanks for the info guys...I finally got it fixed...the heat vacuum switch I bought was actually bad...I just ran a 25 amp fuse between the two hot prongs on the connector and voila it works. I basically just bypassed the switch for now. Everything still works so I may just leave it that way. Only bad I see is the fan won't shut off completely until the ignition switch is turned off but I'm not concerned about that right now with winter coming up.