Simple…the fan for the AC stopped working. The fan will not run weather it’s on AC or the outside air so I’m not sure that this is a AC compressor problem. Thinking it’s just the fan. I swapped fuses to make sure that that was not the problem and my “HVEC” labled fuse worked for the doors so it’s not the fuse. Had the AC on and then stopped at Sonic and the fan did not come back on.
I also got another issue I ought to ask about at the same time. My reverse lights only come on about 50% of the time.
Any suggestions (even direction to another forum) would be greatly appreciated.
It sound like it’s the coolant temp sensor. Also the reverse light sounds like a bad ground. So check to see if anything going to the frame is corroded or damaged.
first check to see if the fan even works. run a hot wire to the fan and make sure it turns on. if so, then look for a sensor, switch, relay, etc. no use looking at those hard to find items when your fan could be dead.
Do you have climate control (where you can set an exact temp)?
I had a car with the same issue, turned out the climate control sensor went bad, thus would never turn on. It was BURIED behind the stereo and a $300 part.
I opted for 20ft of 10gauge wire and a toggle switch to a switchable power.
Yes, it’s either blasting or off, but it does the trick.
Go to the passenger side. Crawl down on the floor board and look up under the dashboard for the fan housing. On the fan housing you should find several wires plugged into the fan blower housing, there should be one screw on each side of these wires. This part is called a Diode Pack; it controls all four speeds of your fan. Usually the 1,2,3 speeds go out but you still have #4 speed, however if you got enough moisture in there you probable blew all four diodes.
I popped mine after using a power washer to clean debris out of the fresh air intake.
This part isn’t super expensive but it is (at least mine was) a pain in the ass to get to.
Good luck and let us know how this works out.
As for the back up lights.
Do you have an Automatic tranny or a Manual?
Either way, the first thing to check is the switch that engages the back up lights. Location depends on type of transmission.
Theirs also a wiring harness connector usually located in the left rear passenger compartment. Go to the back seat area and look up over the fender well at the wiring bundle. Make sure the wires didn’t come unplugged. If this didn’t work, it’s time to break out the multi-meter (Ohm meter) and open up a tail light and check continuity on the ground wire. Most Jeeps have a ground wire that runs with the rest of the wire bundle to a location that is not prone to corrosion or rust, however it could still be the ground wire itself becoming loose on one of the lights. Because the backup lights are combined wiring, one wire supplies power to them. The right backup light should derive it’s power from the left and share the ground.
Therefore if you have a loose wire or wires in the left light both lights will be affected.
Thanks for all the help fellas:). I just got back from T-ball and have read over most of the replies. Luckily with it hitting near 90 today in central Texas, I have a company pick up with AC that is currently working. The Jeep is my personal vehicle (had to drive it to T-ball for example). I am going to have to put some time into this this weekend so wish me luck.
Again, thanks for all of the responses. I’m pretty confident I can do this on my own, just need to be pointed in the right direction.
They cover all 4x4s, but lots and lots of beaters. Get into the yahoo group and you can email a question - be ready for lots of good folks offering advice. Heck if you were local, lots of them will come over for a wrench-a-thon and work for beer.
the reverse light switch is on the transmission they go bad quite often. As for the blower motor it is either the blower motor resistor (that is what controls the speed of the motor) the blower motor itself, or the switch.
the switch on the dash that controls the fan speed is a common problem, they go bad often. take the dash fascia off and pull the knob…it may look and smell burnt behind. Mine hasn’t gone bad but my cousin replaces his once a year at least.
What I found way back when, when I pulled the blower out was that the motor worked but it looked like the leads were a bit corroded. I cleaned them up a bit and applied some dielectric grease and everything worked great until recently. I pulled the blower/motor again and checked it and it still works. Tried scraping the leads clean and applied some more dielectric grease. Worked for a few days only, then I tried it again. Got one day out of it. Any suggestions? I can’t see how this would be a switch problem if it works every time I pull the blower/motor and it works. Could this be a sign that the blower/motor is on it’s way out? I guess it’s possible that the plug that the motor leads plug into could be what’s going too. All help appreciated.
the switch on my roommate’s jeep (early 2000’s i think) went recently. It’s a pretty easy fix. 100 or so for the part.
They had one in stock at the jeep dealer, which makes me think it’s relatively common. He had no HVAC fan in any position, and the AC compressor would not kick on.
however, given you situation, i’d say either a blower problem or a wiring problem… jiggling the connections might be getting it working… intermittent electrical problems are such a pain in the ass to dianose. :mad:
