Brake light works; tail light doesn't - JeepForum.com

 
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post #1 of 10 Old 09-12-2008, 08:09 PM Thread Starter
manofmany
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Brake light works; tail light doesn't

It was vice versa before I swapped a new bulb in. My tail light on the drivers side will not illuminate but the brake light will. What in the world could that be? The socket maybe? Can I get just a new socket somewhere?


1998 Cherokee 4.0L
1999 Grand Cherokee Limited 4.7L
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post #2 of 10 Old 09-12-2008, 11:20 PM
ratmonkey
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on the wj?

it'll either be the seating of the socket or the whole assembly is bad.

'97 zj 5.2, some stuff, some other suff, and some things that even work sometimes.

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post #3 of 10 Old 09-13-2008, 12:21 PM
Grdaemon
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It's a ground thing. Sandpaper.. all contacts..done!

X-Cherokee 1991 Limited Hunter Green
Now 1999 WJ Limited 4.7
Bright Platinum Metalic Clear
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post #4 of 10 Old 09-13-2008, 12:28 PM
stewco
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Buy new sockets

Had the same problem..... I sanded them first, worked for a while, then quit again. Replaced sockets, problem solved.
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post #5 of 10 Old 09-13-2008, 02:49 PM
elmer_fud
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could you bend the contacts in the socket up?

Brian
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post #6 of 10 Old 09-13-2008, 05:05 PM Thread Starter
manofmany
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Hmm one of the contacts did look a little burnt. I'm gonna try going at it. I see a replacement on ebay is like $12 shipped. Not bad.

1998 Cherokee 4.0L
1999 Grand Cherokee Limited 4.7L
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post #7 of 10 Old 09-14-2008, 06:44 AM
Grdaemon
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Quote:
Originally Posted by elmer_fud View Post
could you bend the contacts in the socket up?
They were too tight so I didn't try anything myself..

X-Cherokee 1991 Limited Hunter Green
Now 1999 WJ Limited 4.7
Bright Platinum Metalic Clear
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post #8 of 10 Old 09-14-2008, 09:13 PM
ZJcrawler45
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wait... can i replace the sockets on my zj? i have the same exact problem for about a year now and always thought i had a faulty wiring harness... where do i get just a socket at.? Also when it first stopped working something was burnt black in the socket at the bottom of the bulb.

Captain Nate
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post #9 of 10 Old 04-03-2010, 06:02 PM
wwwired
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Common Tail Light works - Running Light doesn't problem

Quote:
Originally Posted by manofmany View Post
It was vice versa before I swapped a new bulb in. My tail light on the drivers side will not illuminate but the brake light will. What in the world could that be? The socket maybe? Can I get just a new socket somewhere?
The reason for this is that the bulb socket is rotated 180 degrees out of position. The contact points need to be properly aligned (notice there are two contacts on one side and one just one contact on the other side). In the picture below you can see the two silver contact points on one side. The other side (behind and out of view in the picture) has just one:



The bulb unit (a twist in twist out circular unit with a fin that has a notch on one side of the top of the fin cut away) has three contact points for the dual running-light and brake-light circuit. Notice the notch on the bottom left in front of his thumb.



If you look at the lens socket into which the bulb unit is twisted, you'll see it also has three contact points (one on one side and two on the other side).

A common mistake is to insert the bulb unit the wrong way in (rotated 180 degrees). The side with the two contacts on the bulb unit has to line up with side on the lens socket's seat with the two contact points. Likewise the bulb unit side with just one contact point has to line up with the side on the lens socket's seat with just one contact.

You should have three bulbs in each tail light. The two bottom lights will have the fin-notch on the upper side I believe. The fin-notch on the inserted bulb socket for the top light (that contains the combination running-light and brake-light) will face the opposite direction from the two bottom bulb sockets.
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post #10 of 10 Old 08-20-2012, 10:50 PM
BigWheel7
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Quote:
Originally Posted by wwwired View Post
The reason for this is that the bulb socket is rotated 180 degrees out of position. The contact points need to be properly aligned (notice there are two contacts on one side and one just one contact on the other side). In the picture below you can see the two silver contact points on one side. The other side (behind and out of view in the picture) has just one:



The bulb unit (a twist in twist out circular unit with a fin that has a notch on one side of the top of the fin cut away) has three contact points for the dual running-light and brake-light circuit. Notice the notch on the bottom left in front of his thumb.



If you look at the lens socket into which the bulb unit is twisted, you'll see it also has three contact points (one on one side and two on the other side).

A common mistake is to insert the bulb unit the wrong way in (rotated 180 degrees). The side with the two contacts on the bulb unit has to line up with side on the lens socket's seat with the two contact points. Likewise the bulb unit side with just one contact point has to line up with the side on the lens socket's seat with just one contact.

You should have three bulbs in each tail light. The two bottom lights will have the fin-notch on the upper side I believe. The fin-notch on the inserted bulb socket for the top light (that contains the combination running-light and brake-light) will face the opposite direction from the two bottom bulb sockets.
I first thought i had the sockets in wrong as well but the more i looked at it i found they were in correct. I think i have it narrowed down on mine to the sockets are just not making contact with the metal tabs in the lights. Keep in mind these are brand new lights and sockets.
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