Jeep Wrangler TJ 99-04 Heater/AC Vacuum Switch Mopar
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It is true that if the motor is on the verge of failing, it will draw more electricity than the switch can supply. It will alleviate the problem for some time after replacing the blower motor and vacuum switch, but the problem will return once the new blower motor begins to die. On Jeep Forum there is a great write up on how to install relays that will alleviate the amount of power the blower motor and switches consume. Jeep's Research and Development Division overestimated the longevity of their electrical equipment without relays, and that led to a mishap.
In retrospect, this probably should have been the first item to be replaced. It is a bad design Jeep used where a switch is fed with full current for running the motor. Over time, the switch will burn up (actually melt). The Jeep forum shows you how to add relays to the top medium and high setting of this switch in several articles. This will prevent you from having to replace it in the future. It isn't hard to figure out once you figure it out, as I have added relays to several.
Unfortunately, the part will not fit on your Cherokee. I know that hurts to hear, but unfortunately, it cannot be installed. There is a difference in the electrical plug in the back. It's only for wranglers. In an effort to satisfy my curiosity, I went on eBay and found the entire Chevrolet Cherokee control panel As far as I can tell, Amazon does not sell a vacuum switch alone.
I've tried it on my 1999 TJ and it worked. This should be a good thing I wish you the best of
Selected User Reviews For Jeep Wrangler TJ 99-04 Heater/AC Vacuum Switch Mopar
You will likely find this problem is being caused by the vacuum supply coming into the cab if your air conditioner will only blow out of the defrost. The battery tray has several tees and a vacuum reservoir with what appears to be a broken vacuum line. Please be aware that this does not fix the blower speeds In those cases, it is usually a fan resistor or the blower switch that is faulty.
A new one was installed for my Jeep WRANGLER TJ 2000 because the melted plastic connector stuck to three Cooper pin connectors
Once you remove the fan selector switch (FAR RIGHT), air pressure can be heard decompressing. Heatshrinks and other stuff, 6 wires, a little thicker than the once in your Jeep, I also had to replace the other blower motor resistor with the part with lots of holes, however I think that is the resistor that is hot the heater.
This seemed to fit the 2006 TJ based on the questions. In order to make it fit properly and work in my 06 TJ, I had to modify it. A wrong diameter was used for the vacume posts. After installing new vacuum posts, diaphragm, diaphragm plate, and spring, I was able to update my old switch to work seamlessly. With a razor blade, I also needed to trim two posts on the housing. There was a switch on my old AC that couldn't turn it off. The system now works perfectly and I did not have to spend $160 to get it to work. A control panel costing $2,000 is required for the entire AC system.
You must search YouTube for the replacement videos in order to install them. We could complete the repair in 30 minutes, including removing the dash. If you are unable to find your dash knobs on Amazon, don't rule out the possibility that they are worn out and will need to be replaced. It appears that might have been my problem all along, as the plastic knob had become brittle and was broken inside, allowing it to rotate freely and not actually turn.
I got them for a 2000 Jeep TJ. There's an intermittent problem with the blower. Prior to installing it, I had replaced pretty much everything. I was able to solve my problem within a few minutes. I called the auto stores and dealership for the part, but they only sell the entire console for $129, instead of the part.
It only took a few minutes to install, and so far it looks like it's working well.
I had no problems with this part. Since I made a mistake, it had to be done twice. The control handle had a crack on the inside that could not be seen, so the new part appeared to be inoperative. I took the whole thing apart and was going to buy another part when a friend suggested I try using the channel locked moving stem instead. Works great now that I have a new control handle.
I have never seen a plastic heater/AC vacuum switch as good as this one made by Mopar. As a replacement for my Jeep's second best plastic heater/AC vacuum switch made by Mopar, I found it so impressive I used it as a replacement.