Recently, I've found time to catch up on some XJ Cherokee care. Our '99 had issues with the power window/door lock system, the A/C dash panel air flow and the "No Bus" gauge drop-off problem. Each of these problems is common to the XJ Cherokees and TJ Wranglers, making forums all over the internet. On our Cherokee, I worked through the troubleshooting and solutions for each.
If your Jeep XJ Cherokee or TJ Wrangler is experiencing erratic dash panel air flow with the heater or A/C controls set to different positions, you'll want to check out this new article at the magazine: http://www.4wdmechanix.com/How-to-Jeep-XJ-Cherokee-Air-Conditioning-Fix.html. Another symptom to consider is the cruise control and the A/C and heater panel settings not working when you're climbing a grade with the Jeep. I made the Chrysler TSB #24-12-99 available as a PDF download. This is one cure, but it did not apply in our case...
If your power windows, door locks and remote door lock control are not operating properly, you'll want to see my recent article: http://www.4wdmechan...eplacement.html. This includes troubleshooting symptoms and the actual replacement of a door switch module.
If your dash instruments suddenly drop-off to zero with the engine running or on the road, or if the "No Bus" signal appears at the instrument panel with erratic gauge activity, you may have the electrical connector issue that I address in the article: http://www.4wdmechan...Gauges-Fix.html. This how-to goes into detail about the problem, the parts involved and the fix, including soldering a new plug and wires into the dash panel circuit. I even included a PDF of the Chrysler/Jeep TSB #08-15-99 on this problem for both the Jeep XJ Cherokee and TJ Wrangler.
Having troubles in these areas? Check out the three new articles at the magazine. Another issue is the rear door latch and having to press the outside door release button with great force to open the door. Possible remedy: There is a slot on the rear facing edge of the door that has an adjustable slide for the door button. Work the button and watch this lever move. You can loosen the Torx screw and move the lever/button adjuster to allow for a full throw of the outside handle button when you press the button. This and some white lithium spray lube at pivot points of the latch mechanisms can have your "defective" rear door latches functioning as new!