rear right tail light short - JeepForum.com
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post #1 of 18 Old 07-02-2009, 03:37 PM Thread Starter
shesajeep
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rear right tail light short

hey i have been having a short with my right rear brake light. Its a 99 WJ 4.0L. it started happening when i had my trailer hooked up to my trailer hitch and the trailer tail light quit working but my brake light on the car still worked. then the tail light eventually began to short out. all the fuses are fine and then i went to where the trailer harness is plugged into and unplugged it then plugged it back in and it was working for a little while then happened again.
whats weird is that its only the brake light. the reverse, turn, and park lights all work.
does anyone have any idea what the heck is going on?

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post #2 of 18 Old 07-02-2009, 04:25 PM
iluvtruenos
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Simple, happened to me.

First check the trailer wiring, it might have rubbed somewhere and shorted out.

Next, make sure there is no water/mud in the plugs, those can short out too. <- actually do this one first, it's easier.

My Jeep is a chick magnet with reverse polarity.

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post #3 of 18 Old 07-04-2009, 03:04 PM Thread Starter
shesajeep
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well how is yours wired in the rear. there is a rubber plug towards the left tail light and i have it thread through there. could this be the problem? should i drill through the rubber plug rather then have it run down the side?
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post #4 of 18 Old 07-04-2009, 03:11 PM
jeeptrash
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Strange, my girlfriends '99 WJ has something similar going on i have not been able to figure out. It's her right rear light, works great till you turn on the headlights, then the running lights/turn still work fine but when you hit the brake the whole light goes out. I do not have a trailer wireing setup on her's either. It's got me stumped, i changed out all the bulbs and it didnt fix it either... Maybe it's just a 1999 WJ thing curious to see if you can fix yours.
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post #5 of 18 Old 07-04-2009, 05:01 PM
iluvtruenos
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Ok, on my Jeep, there is a plug that threads through the floor in the trunk that has the trailer wiring harness.

If your rubber plug is still intact, and the wires are in the center, then it obviously didn't rub (I'm sure you can imagine what it would look like if the wires rubbed against metal for 5k miles or so).

Next, check the actual trailer light socket (lift the little latch) and look inside. Is it dirty? Packed full of mud? I know that after every off-roading excursion I have to take off the plug (unbolt the four bolts) and physically clean out both sides of it, since I unplug the pigtail before going out.

Do that and report back, your problems should be solved.

In the meantime I will continue with the head scratching.

My Jeep is a chick magnet with reverse polarity.

Rampant Pack of Retards group president.
2000 WJ, 4.5l, AX15, 242 D60/14b, 5.5" lift front, 7.5" rear. Ford Expedition rear coils, Ram 350 shocks, JKS, IRO Long Arms, cool Badlands flag thingy.
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post #6 of 18 Old 07-05-2009, 12:03 AM
SaturnICL
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Quote:
Originally Posted by garbs View Post
Strange, my girlfriends '99 WJ has something similar going on i have not been able to figure out. It's her right rear light, works great till you turn on the headlights, then the running lights/turn still work fine but when you hit the brake the whole light goes out. I do not have a trailer wireing setup on her's either. It's got me stumped, i changed out all the bulbs and it didnt fix it either... Maybe it's just a 1999 WJ thing curious to see if you can fix yours.
Chrysler sucks You have to buy bulbs form them! They have a special resistance so if you buy them from Auto zone or similar this will occur. Go to dealer and get bulbs the problem will go away.
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post #7 of 18 Old 07-05-2009, 09:40 AM
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Quote:
Originally Posted by SaturnICL View Post
Chrysler sucks You have to buy bulbs form them! They have a special resistance so if you buy them from Auto zone or similar this will occur. Go to dealer and get bulbs the problem will go away.


Really? Go chrysler!! I will feel stupid going the the dealership to get bulbs, but if it fixes the problem, i owe you a cold one. Been trying to figure this one out for months now.
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post #8 of 18 Old 07-05-2009, 11:08 AM
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Quote:
Originally Posted by SaturnICL View Post
Chrysler sucks You have to buy bulbs form them! They have a special resistance so if you buy them from Auto zone or similar this will occur. Go to dealer and get bulbs the problem will go away.
Could you tell us where you heard that Chrysler uses SPECIAL bulbs? Also what is the resistance of the Chrysler bulbs and their part numbers?
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post #9 of 18 Old 07-05-2009, 02:39 PM
iluvtruenos
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Hmm. I call bull**** on that one too. IIRC, all my bulbs have either Sylvania, or some other manufacturer name and product number on them. No pentastar, or Chrysler logo.


Also, I'm pretty sure they weren't all swapped out either.

My Jeep is a chick magnet with reverse polarity.

Rampant Pack of Retards group president.
2000 WJ, 4.5l, AX15, 242 D60/14b, 5.5" lift front, 7.5" rear. Ford Expedition rear coils, Ram 350 shocks, JKS, IRO Long Arms, cool Badlands flag thingy.
1987 XJ - Gone but not forgotten
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post #10 of 18 Old 07-05-2009, 02:46 PM
jtsjeep99
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My father-in-law's WJ did the same thing. Since I sold it to him he always comes to me with any problems. We took the assembly from mine and put it on his and it worked so not the wiring. Then we changed out the socket and mine worked in his but his didn't in mine. We determined it was the socket that holds the bulb had some kind of short in it. Replaced and problem went away.
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post #11 of 18 Old 07-06-2009, 01:23 PM Thread Starter
shesajeep
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alright well i will look at the socket and see if i cant clean it out and hope that will work.
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post #12 of 18 Old 07-06-2009, 03:29 PM
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shesajeep,
Your problem is in the trailer otherwise it would happen even with the trailer unplugged. My guess is moisture in one of the light housings. Trace all the wires and take out all the lights and check for corrosion on the bulbs and in the sockets that could possibly create a short.

garbs and iluvtruenos,
Your issue is with the connection in the bulb socket. Use a nail file or sand paper to clean the contacts in the socket then a screwdriver to bend them in twards the center a touch. I did this with mine and havn't had the problem since.

Because I felt like it!
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post #13 of 18 Old 07-06-2009, 03:45 PM
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Quote:
Originally Posted by georged View Post
Could you tell us where you heard that Chrysler uses SPECIAL bulbs? Also what is the resistance of the Chrysler bulbs and their part numbers?
A friend and Mechanic for dodge and backed up by an other friend and parts manager for Jeep who then sold me the bulbs on a bet that he would install them for free to prove to me that it would fix my problem even though I called BS too! IT DID! I am now on my second WJ it had the exact same tail light problem when I got it so off to the jeep parts counter I went to buy bulbs and VIOLA fixed again.

TRY IT BEFORE YOU KNOCK IT!!! I was a nonbeliever once too
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post #14 of 18 Old 07-06-2009, 05:07 PM
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Quote:
Originally Posted by SaturnICL View Post
A friend and Mechanic for dodge and backed up by an other friend and parts manager for Jeep who then sold me the bulbs on a bet that he would install them for free to prove to me that it would fix my problem even though I called BS too! IT DID! I am now on my second WJ it had the exact same tail light problem when I got it so off to the jeep parts counter I went to buy bulbs and VIOLA fixed again.

TRY IT BEFORE YOU KNOCK IT!!! I was a nonbeliever once too
i tried the Dealer bulbs they blew just like meh others I ended up replaceing the ENTIRE tail Light+all the sockets #1 all of them were yellow and weather beatin + the circuit board in the tail light melted some how so it melted the socket to light
New tail light assembly $50 on ebay Sockets from Online $5 a piece.

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post #15 of 18 Old 07-07-2009, 09:04 AM
tazimafied
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Quote:
Originally Posted by SaturnICL View Post
A friend and Mechanic for dodge and backed up by an other friend and parts manager for Jeep who then sold me the bulbs on a bet that he would install them for free to prove to me that it would fix my problem even though I called BS too! IT DID! I am now on my second WJ it had the exact same tail light problem when I got it so off to the jeep parts counter I went to buy bulbs and VIOLA fixed again.

TRY IT BEFORE YOU KNOCK IT!!! I was a nonbeliever once too

So, he installed them for you? Did he happen to clean out the socket before installing the new bulb?

Because I felt like it!
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