If it is the tail lights that are inop there are some common problems associated with this model Jeep. The most common is the tail light sockets. They often melt the housing they fit into and consequently lose ground. The only way to properly fix this is by replacing the entire taillight assembly''italic text''. They have come way down in price and I'm sure by now there are aftermarket solutions. I usually don't use aftermarket electrical parts, but Dorman has made some good stuff and proved me wrong. The very first thing I would check is that the instrument cluster lights are working when the lights are on. If not, check the fuse-they are on the same circuit. It could be that simple. Keep your eye on the cluster lights-when they're not working,neither are your tail lights! Show If you have the fancy "Automatic " lighting system it can get a little weird. There was a big problem with BCM's (Body Control Modules). When they go bye-bye, you might think that your Jeep is possessed! The lights will flash on and off in the middle of the night! Unfortunately you will need some specialized equipment for this. The BCM isn't that big of a deal, but you will need a DRBIII factory scan tool to "marry" the BCM to the Jeep. If I had to make a wager, it'd be the sockets and tail light assemblies. It's a very easy repair-pop the hatch and remove a couple of screws. The assemblies used to come with brand new sockets and bulbs. Plug n play!Love me some Jeeps! Carefully look at the socket for the rear tailights and all lights on that circuit. You may be getting a poor ground or corrossion is causing a ground feedback. Hard to diagnose something like this from afar even with 10+ years of factory training on Jeeps. Does anything change if you have the brake lights on? This is a ZJ model right? If its a Grand Cherokee that changes everything except looking at the light sockets and associated wiring. Does your Jeep have a trailering plug? That can also create some havoc. If you want to give me the VIN number I'll dig deeper. If there's a way to privately message on here I'll give you my phone number and help as much as I can. Bruce Trailer lights not working Newbie Thread Starter
Join Date: May 2012 Location: Indianapolis Posts: 3 Likes: 0 Received 0 Likes on 0 Posts Year: 2011 Model: Grand Cherokee Engine: 5.7 Hemi Really long story short... my 2011 Jeep Grand Cherokee 70th edition did not come with a trailer hitch. I added one and the harness to plug in my trailer lights. The Jeep had a factory harness just behind the bumper that matched perfectly to the Hopkins brand aftermarket
harness/extension that bolted perfectly to the draw tight hitch. Trailer had running lights but no brake lights or turn signals. I spent a really long time researching what to do. Bottom line... Jeep must turn on the trailer lights function to power up the trailer harness brake/turn signals. Take it to Jeep dealer and they download changes based on your VIN and upload them to your vehicle. Pay them $90. Trailer lights will work then. Pain in the *** and no one knew about it until I contacted a
small Jeep dealer in a small town. Hopkins trailer harness did not know about it either but the clue was that they said the 2012 Ford Explorer had to have the programming changed to make their harness "power up". Three Jeep dealers did not know about it. Get the word out and save a bunch of wasted time trying to figure it out. Thread Thread Starter Forum Replies Last Post roninofako Off-Topic Discussion 601 04-25-2022 02:54 AM Aryl Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here 10 04-10-2019 09:07 AM BayArea93xj Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here 8 06-11-2016 10:43 AM rusty_bucket Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here 3 08-29-2015 06:42 AM Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
What would cause trailer lights to stop working?Possible causes: Burnt out light bulb causing a break in the system; corrosion in harness, light plug or pigtail; ground problem; hydraulic lock from too much dielectric grease; bad spot in wiring harness; issues in the 7-way plug; issues from the tractor. 1. Check to see if you have power at the 7-way of the trailer.
Is there a fuse for trailer lights?If you're problem was turn signals then simply look for the trailer RT or LT fuse and simply replace if needed. This will solve the problem of brake lights also, as they are the same fuse.
Why do all my trailer lights work except running lights?If the wire has been pinched, torn, or damaged, then the running light circuit is likely not reaching the light. You can test the wires on the back of the taillights that carry the running light signal with a circuit tester, # 40376, to see if they have signal behind the light housing.
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2015 jeep cherokee trailer lights not working
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