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brake light problem


 
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langston
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Joined: 20 Aug 2006

PostPosted: Fri Aug 25, 2006 6:40 pm    Post subject: brake light problem Reply with quote

my brake lights arent workin on my 2000 tj. i put in new bulbs, and i replaced the brake light switch. my reverse lights work and tail lights, but the brake lights do not come on. what else could i check or might be the problem. should i check the fuses?
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kizer
The Link Meister
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Joined: 02 Jan 2004
Location: Marysville, North of Seattle

PostPosted: Fri Aug 25, 2006 9:03 pm    Post subject: Reply with quote

Heres a basic diagram of how my LED's are wired up from the stock harness.



If everything works, but they brake lights I wonder if it could be a ground somwhere or a fuse.
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langston
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Joined: 20 Aug 2006

PostPosted: Fri Aug 25, 2006 10:26 pm    Post subject: Reply with quote

how would i go about checking that?
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TJ Apex
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Joined: 29 Jul 2005
Location: Mountains of SoCal. 6257 elev.

PostPosted: Sat Aug 26, 2006 9:12 am    Post subject: Reply with quote

You'll need a Volt Ohm Meter (VOM) with a continuity check to do this test.
Remove the left bulb then Turn your lights on, check the two contacts in the socket to find out witch one is your running lights. Then (You'll need help with this) have someone push the break pedal so you can check the other contact to verify weather or not your getting voltage. DO NOT USE THE SOCKET FOR THE GROUND. this will give you a false reading, find a known good ground source. If your not getting voltage, check your fuses, sometimes the break light will have a seperate fuse. make sure all contacts are clean etc. If you are getting voltage then it's your ground.

The socket it self is the ground source, if your VOM has a continuity setting, put one probe on a known good ground and the other on the socket, you should get a reading or an alert of some type, if not, that's your problem. find your ground wire ( it should be a short black wire going to the chassis) make sure you have good wire that has no broken jackting and that the contact area is clean.
You might only have one wire that goes to the chassis, the wire should run from the chassis to the break light then split off the one light and go to the other light. "Dasiy chaining" the ground is common practice in the automotive industry, This is why both break lights appear to be out.

Hope this helps ya Wink
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langston
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Joined: 20 Aug 2006

PostPosted: Sat Aug 26, 2006 1:55 pm    Post subject: Reply with quote

thanks everyone, i got it working this afternoon. heading out to the sand dunes this weekend for labor day, everyone enjoy theirs
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TJ Apex
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Joined: 29 Jul 2005
Location: Mountains of SoCal. 6257 elev.

PostPosted: Sun Aug 27, 2006 1:02 pm    Post subject: Reply with quote

When you get the chance, let us know what you found was the problem.
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Gamgan
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Joined: 02 May 2005

PostPosted: Sat Sep 09, 2006 8:56 pm    Post subject: Reply with quote

my brake lights didnt come on either, but a friend suggested I switch the switch thats connected to my brake pedal ( no idea what its called) that fixed it for me
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ehirner
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Joined: 01 Jan 2004
Location: Eastern PA

PostPosted: Sat Sep 09, 2006 9:28 pm    Post subject: Reply with quote

Gamgan wrote:
my brake lights didnt come on either, but a friend suggested I switch the switch thats connected to my brake pedal ( no idea what its called) that fixed it for me

The brake light switch???
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