Rear Lights dont work ONLY when i brake.. - Team Camaro Tech
Troubleshooting Diagnosing problems done here.

 
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post #1 of 10 (permalink) Old Mar 14th, 02, 09:43 AM Thread Starter
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Ah the problems never stop. Oh well.. one small problem at a time. Well i decided to go ahead and do some wire splicing cause my brake light left-inner socket wasnt working... well i unspliced that wire.. then went ahead and respliced..
Now on to the bad news..

First wire splice i guess i didnt put the right wires together cause the lights didnt work at all except for the turn signals.. onto the next one... well i respliced them again, this time correctly..(so i thought).. well they work now in EVERY circumstance.. EXCEPT when i press the brake.. well whoopdidy dooo! All the lights turn on now.. blinker works and night lights work but if i press the brake at any time even with the blinker on it wont register it in my rear lights?


Oh what to do, what to do..

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post #2 of 10 (permalink) Old Mar 14th, 02, 12:17 PM
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When a side is blinking, that side selected to blink will not have brake light working.

But, other side brake light should work.

When turn signals are selected, brake lights and tail lights do not work for selected side.

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post #3 of 10 (permalink) Old Mar 14th, 02, 02:36 PM
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I was having some problems during the resto work 'till I ordered my wiring diagram for $6 from Rick's. Those are the best spent few bucks, a little difficult to understand at first but nothing that can't be deciphered with some patience. Try to follow the color codes in the wires and check the ground ones.

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post #4 of 10 (permalink) Old Mar 14th, 02, 02:53 PM Thread Starter
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when i said the side would blink i was just trying to tell ya that the lights do work.. it just wont show when i push the brake pedals.. as for the diagram the person who put the previous harness together didnt go by the right color codes as the wires are all not the same colors..

the prob is that it DID work before i did the wire splicing.. yet after i put it back to the way i did it before it still doesnt work right.. so now im stuck where im trying to troubleshoot why the brake lights dont come on when i press the brakes.. ?
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post #5 of 10 (permalink) Old Mar 15th, 02, 12:20 AM
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You might start by checking the fuse at the fuse block on the firewall above the left foot.

However, you said the turn signals work. This is good. But, no brake lights. They both use the same bulb filament. Might have a bad brake pedal switch.

If it worked before, carefully think what you did and go back over your steps of repair.

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post #6 of 10 (permalink) Old Mar 15th, 02, 01:10 AM
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try running a temporary ground wire from the tail light bezal to a spot in the trunk. I had an intermintant problem with same thing. ended up being a bad ground.

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post #7 of 10 (permalink) Old Mar 15th, 02, 02:48 AM
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Doug, is on the right track sounds like the lights are using the filament to pass ground current. When you step on the brakes the current overpowers the ground . I would start there!
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post #8 of 10 (permalink) Old Mar 15th, 02, 04:59 AM
 
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The bulb sockets are notorious for having bad ground connections. The idea is that the metal contact on the sides of the socket are supposed to complete the ground by touching the metal of the light housing. Sadly, both get a bit corroded and then there is a bad ground and the behavior you spoke of is the result. Take a little sandpaper, sand the corrosion off and also make sure that the bulb socket fits tightly into the light housing.

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post #9 of 10 (permalink) Old Mar 15th, 02, 10:27 AM Thread Starter
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thanks guys! ill give it a try.. im hoping that is what the problem is
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post #10 of 10 (permalink) Old Mar 15th, 02, 01:50 PM
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Take the bulbs out and go to the point where you respliced the wires. Take a voltmeter and go to ground with one lead and probe each of the wires coming to the splice point while you have someone step on the brake pedal. See if you are getting 12v to that point. Like said above, check the fuse and tag all the wires when you figure them out.

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