1999 XJ 4.0
Just lost all heat in the middle of winter. I had a problem with the blower only working in high so I replaced the resistor about a year ago. Been fine ever since. Now i have nothing on any setting cold or hot. Checked fuse #25 it's fine. Wheres the relay? Is it behind the glove box also? I'll check that next and work from there.

 

Now that I think about it I should probably try jumping the blower to the battery to make sure it's not that now that at and make sure the connector didnt burn up.

 

fuse 6 in the PDC under hood (40amp) feeds the blower motor relay

 

Fuse 25 also feeds your shift lock solenoid so if it was bad (which I know you said is good) you wouldn't be able to shift out of park.

 

The blower motor relay (Fig. 7) is located in a wire harness connector that is secured to the heater-A/C housing behind the glove box on the passenger side of the vehicle, next to the heater-A/C wire harness connector in the passenger compartment. Remove the relay from its connector to perform the following tests:

(1) A relay in the de-energized position should have continuity between terminals 87A and 30, and no continuity between terminals 87 and 30. If OK, go to Step 2. If not OK, replace the faulty relay.

(2) Resistance between terminals 85 and 86 (elec- tromagnet) should be 75 􏰇 plus or minus 5 ohms. If OK, go to Step 3. If not OK, replace the faulty relay.

(3) Connect a battery to terminals 85 and 86. There should now be continuity between terminals 30 and 87, and no continuity between terminals 87A and 30. If OK, see the Relay Circuit Test procedure in this group. If not OK, replace the faulty relay.

 

You're the man, thanks. Ill have a look tmw in the sunlight. Looking back I think I remember smelling something burnt when I turned on the heat the other day.

 

If anyone has trouble finding the relay, I found a few decent pics to help locate it.

 

Got to it all this morning. Checked resistor, fan selector switch, relay, and pdc and kick panel fuse. All good. No burnt up connectors. No popped fuses. Swapped out the relay. Still no blower. So at this point I guess it's the motor or wiring.....I'll pull out the multi-meter later and check everything again.

 

I don't see why you can't just put power to the motor.
Briefly.
Rule it out maybe and go from there.

 

Bc I cant fit my fat hand to the connector without moving the ac tank and a whole bunch of other crap. I figured to check the accessible stuff first



Its somewhere down through this mess

 

Most likely the blower... As you more than likely figuring out right now... Other than the stuff you need to move from the way it is easy to swap out... This is just a filler post I accidentally posted something here and just edited it.

 

Yeah it might be worse then that. Maybe. Googled replacing one to see if I could get a idea where the connector pigtail might be.
Looks like there is not one. Connector plugs directly into the blower motor.
So to test have to figure out where that wire goes to under the dash.
Which might turn out to be easier.
Start watching around 5:34.

 

If you can get to the wires going to it use a voltmeter and just back probe them with some sharp pointed probes to see if power is going to it.

 

Got to the connector going to the motor, now ofcourse I cant find my multimeter. Off to home depot.

 

Connector is getting 12.2 volts. Safe to say it's the motor?