Rear Brake Light & Flasher Problem - Team Camaro Tech
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post #1 of 5 (permalink) Old May 28th, 13, 09:36 PM Thread Starter
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James
 
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Question Rear Brake Light & Flasher Problem

I am in the final stages of installing an American Autowire Classic Update Kit in my 1969 Camaro, but have run into a problem with my drivers side rear lights. Here is what's happening.

The drivers side rear brake lights and emergency flashers are not working. The turn signal works and the parking lights work. I do not have any voltage at the Yellow wire at the bulb socket. I do not have any voltage on the Yellow wire at the rear harness connector. I don't have any voltage at the Yellow wire at the turn signal switch "harmonica" connector. I do, however, have 12 volts coming to the Green wire leading to the passenger side rear tailights. Both tailights share a good ground in the trunk.

I have double and triple checked all of the grounds that I know of. I even went through and "dremeled" the metal on every ground and checked resistance with a multimeter to ensure a good ground connection.

If I am not getting any voltage at the Yellow wire at the turn signal switch "harmonica" connector, could my turn signal switch be bad? Why would it only be the Yellow wire that doesn't have any voltage? Is there another way to trouble shoot this problem?

I need to figure this problem out by the weekend. Thanks in advance!

-James
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post #2 of 5 (permalink) Old May 29th, 13, 04:27 AM
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Re: Rear Brake Light & Flasher Problem

Reads like the problem is the turn signal switch.
Make sure you have three power inputs, turn signals is given, so hazard power and brake light power from the brake light switch.

You might take and jumper the green power to rear bulb over to the yellow wire ensuring the circuit does work, I'm sure the bulb will work since you have t/signal.
Jiggle the turn sig handle as gravity has taken its toll over the years and the bushing has worn out. It has supported a metal handle, for how many years?
You might remove the steering wheel gaining access to the t/sig switch and discover the contacts could use a cleaning with emery cloth, providing the switch is in good shape, or a wiper/contact has lost its tension and not making contact.

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post #3 of 5 (permalink) Old May 29th, 13, 07:44 AM Thread Starter
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James
 
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Re: Rear Brake Light & Flasher Problem

Quote:
Originally Posted by Everett#2390 View Post
Reads like the problem is the turn signal switch.
Make sure you have three power inputs, turn signals is given, so hazard power and brake light power from the brake light switch.

You might take and jumper the green power to rear bulb over to the yellow wire ensuring the circuit does work, I'm sure the bulb will work since you have t/signal.
Jiggle the turn sig handle as gravity has taken its toll over the years and the bushing has worn out. It has supported a metal handle, for how many years?
You might remove the steering wheel gaining access to the t/sig switch and discover the contacts could use a cleaning with emery cloth, providing the switch is in good shape, or a wiper/contact has lost its tension and not making contact.
Thanks for the input and quick response.

I currently have the steering wheel off to replace the turn signal cancel cam. I guess while I'm in there I could check the turn signal switch contacts. Is there anything in particular I should look out for? I've never inspected behind the run signal cancel cam before...

I am stopping by the local auto parts store after work to pick up a new turn signal switch. Is there any way I can plug it into the "harmonica" connector an test everything without putting it in the steering column? I'd hate to go to all of the work to replace the turn signal switch if that isn't the problem...you know?
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post #4 of 5 (permalink) Old May 29th, 13, 09:40 AM
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Re: Rear Brake Light & Flasher Problem

Yes, you should be able to plug in outside of the column for checking.

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post #5 of 5 (permalink) Old May 29th, 13, 08:02 PM Thread Starter
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Re: Rear Brake Light & Flasher Problem

I ended up saying "screw it" and just replaced the run signal switch for the hell of it. Turns out that everything works now! I still have to put the steering column back together, but I am one happy camper. I can officially say that there isn't one wire on this car that I haven't replaced now. Thanks guys!
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