Rear running lights on 99 cherokee

If you want to solve your problem, click on the link I attach
https://www.reliable-store.com/products/jeep-grand-cherokee-wj-wg-99-04-workshop-repair-manual-download

Follow the code, Replace the rear o2 sensor

Center councel at the floor

Well. The rear brake light go out is a command problem for the 99-04 Jeep WJ. I personally think there is a short somewhere from the factory design.

The rear window washer should be utilizing its own switch. Clean out the spray nozzle as well.

For my 99 jeep cherokee sport it was the switch itself that needed replacing. After doing a search on google I found one for about 30 bucks and it only take a few minutes to replace. I am a novice when it comes to these things but it wasn't to hard at all.

Check spark to plugs. Possible crankshaft position sensor. Located at rear of engine between engine and trans.

It sounds like a bad connector (corroded, damaged) near the taillights. Take all of them loose and inspect. Clean dirty ones, replace unrepairable damaged connectors.

Have you checked to see if there is power there with a test light(with lights on).
Discoloration really means nothing.

I have a 2004 Jeep Grand Cherokee that I purchased only three months ago. It has already been in the shop three times in a month so I fee like I can help you with your problem. My rear brake light did the same thing and I just had to purchase the whole light socket. It only cost $13.00 from Jeep. I know your jeep is a 99' but the mechanic said that all Grand Cherokees from the last six years or so had the same problem. Changing the light bulb won't work. It will simply burn your bulb out. Simply buy the plastic socket that the bulb snaps in and that should fix your problem. It did for me.