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Unread 08-08-2005, 06:12 PM   #1
profssr2017
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Brake Light Problems - 3rd Light works - others don't

Hi - New Guy here -

I've got a 2000 TJ - this weekend, both brake lights refused to work, but the third light works fine. I've checked both bulbs, and they appear to be ok.

Anybody have an ideal of where to look for the problem? PS - please be as specific as possible for where to look - I'm new to this TJ.

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Unread 08-08-2005, 06:37 PM   #2
wherndon
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the bulbs "appear" to be okay?
Looks can be deceiving.
A cheap test is to buy one new bulb and give it a try.
IMHO
Bil
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Unread 08-08-2005, 06:40 PM   #3
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BTW, welcome to the forum. I didn't notice it was your first post.

the center brake light uses a different bulb, so it's possible that both side lights are bad...

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Unread 08-08-2005, 07:19 PM   #4
profssr2017
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I will check both bulbs with a tester tomorrow - but they went out simultaneously (I had the TJ inspected in May) - I've looked at the switch on the brake pedal - seems that about six wires come out of it - Is it possible that a portion of the switch controls the normal brake lights and another portion controls the third light?

Oh yeah - thanks for the welcome.
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Unread 08-08-2005, 07:55 PM   #5
wherndon
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Quote:
Originally Posted by profssr2017
I will check both bulbs with a tester tomorrow - but they went out simultaneously (I had the TJ inspected in May) - I've looked at the switch on the brake pedal - seems that about six wires come out of it - Is it possible that a portion of the switch controls the normal brake lights and another portion controls the third light?

Oh yeah - thanks for the welcome.
No. One switch controls all. The switch is good.
possibly something wrong in the wiring harness.
do the bulb check first.
Bil
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Unread 08-08-2005, 08:16 PM   #6
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I guess I should have mentioned that I had checked both of the socket poles - the pole for turn lights had voltage when the turnsignal was on, but not when the brakes were applied - the other pole seems to be for the tailights. I have running and backup lights and turn signals - it's just the brake lights. I also removed enough of the inner fender to unplug the harness connectors - had both turn signals (left is a Green/Red wire, right is a Red/Brown wire) and taillights but no voltage to the black/yellow wire, which I believe is the brake light wire.

So I'm flummoxed as to why the third light works, but not the normal two brake lights.

The third light does not appear to have a plug connector - the two wires emerge from the wiring harness on the passenger side near the plug connector for the passenger side lights.

Anyway - Bil - thanks for you help - keep the ideas flowing - and I'll get some more bulbs tomorrow. It had started to rain, so my exploring was cut short.
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Unread 08-08-2005, 08:22 PM   #7
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Quote:
Originally Posted by profssr2017
I guess I should have mentioned that I had checked both of the socket poles - the pole for turn lights had voltage when the turnsignal was on, but not when the brakes were applied - the other pole seems to be for the tailights. I have running and backup lights and turn signals - it's just the brake lights. I also removed enough of the inner fender to unplug the harness connectors - had both turn signals (left is a Green/Red wire, right is a Red/Brown wire) and taillights but no voltage to the black/yellow wire, which I believe is the brake light wire.

So I'm flummoxed as to why the third light works, but not the normal two brake lights.

The third light does not appear to have a plug connector - the two wires emerge from the wiring harness on the passenger side near the plug connector for the passenger side lights.

Anyway - Bil - thanks for you help - keep the ideas flowing - and I'll get some more bulbs tomorrow. It had started to rain, so my exploring was cut short.
Well, more info...
If the turn signals work, then the bulbs are okay.
If that is the case then it's the wiring harness, or maybe I am wrong about the switch.
Not sure how to test the switch...
Bil
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Unread 08-11-2005, 06:47 AM   #8
profssr2017
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Well - I found the problem - - the Hazard Light switch on the steering column was partially down, but not down far enough to turn the Hazard lights on - that apparently caused the two brake lights to not work, yet the 3rd light will still work.

So, everything is fine now.

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Unread 09-30-2005, 05:57 PM   #9
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brake lights

Turning on and off the hazard lites fixed the brake lite problem for me also.
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Unread 09-30-2005, 06:08 PM   #10
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The third or CHMSL light does not go through the turn signal switch. I has its own circuit and goes directly from the brake switch to the CHMSL.
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Unread 09-30-2005, 09:55 PM   #11
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Quote:
Originally Posted by wherndon
Well, more info...
If the turn signals work, then the bulbs are okay.
If that is the case then it's the wiring harness, or maybe I am wrong about the switch.
Not sure how to test the switch...
Bil
not true my front side markers went out at the same time but still had turn signals as they use a duel filament bulb
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Unread 09-30-2005, 10:06 PM   #12
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Quote:
Originally Posted by dzntzhellfire
not true my front side markers went out at the same time but still had turn signals as they use a duel filament bulb
Yes true!
I was just referring to the rear lights, they are dual filament but the same filament is used for the brake light and turn light. If it works for one then the bulb is okay.
Anyway, it appears the e-flasher switch was the culprit, and everything is fine now.
Regards,
Bil
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Unread 10-01-2005, 06:44 AM   #13
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The combo switch can cause lots of problems...and seems to.
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Unread 04-21-2010, 06:28 PM   #14
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Thank you!! I took my new TJ to get inspected and it didnt pass because we couldnt figure out why the damn break lights stopped working! It was the flashers... I turn them on and back off all of the way and voila! Thanks for the thread! I am too, a new Jeeper! Runnin six days strong and loving every minute of it! :-)
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Unread 09-11-2013, 10:43 PM   #15
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Switching my hazard on and off didn't fix my issue, but clicking my turn signal up, down, then center did. Guessing the turn signal hadn't quite returned to center. Strange... but glad it was an easy fix.
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