'68 Camaro weak lights one side only, no L turn... - Team Camaro Tech
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post #1 of 10 (permalink) Old Nov 1st, 18, 05:28 PM Thread Starter
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'68 Camaro weak lights one side only, no L turn...

Here's one for you guys... L side brake light noticeably weaker than R side; L turn signal steady on (front & back) when activated; R turn signal/brake lights OK; newly soldered ground connections from both brake light sockets to chassis; all 4 flashers operational, but L front & back are weak. Mechanical flasher, incandescent bulbs all around. What connections or components might affect just one side?
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post #2 of 10 (permalink) Old Nov 1st, 18, 06:45 PM
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Sounds like it could be a ground wire issue. Or maybe the sockets in the taillights not grounding.
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post #3 of 10 (permalink) Old Nov 1st, 18, 07:15 PM Thread Starter
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Re: '68 Camaro weak lights one side only, no L turn...

That's what I thought at first, so I soldered ground wires to both brake light sockets, no change.
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post #4 of 10 (permalink) Old Nov 1st, 18, 08:10 PM
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Re: '68 Camaro weak lights one side only, no L turn...

since you have a good ground did you tried replacing the bulbs and flasher? brake and flash use the same filament and both go through the turn signal if the bulbs and flasher doesn't fix it then I would say is the signal switch

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post #5 of 10 (permalink) Old Nov 2nd, 18, 05:47 AM
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Was it working before and all of a sudden this started happening? Or are you just now getting everything working?

I had a similar issue a few years back on mine. Maybe yours is caused by something different. I adjusted the rear sockets. A few of my ground connections were also missing the star washers after being painted. Check the ground connections near the front turn signal lights and also the battery. I also changed the little bulbs in the dash that light up. With those several things it fixed my issue.

Maybe somebody more knowledgeable can chime in. Good luck.
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post #6 of 10 (permalink) Old Nov 2nd, 18, 08:12 AM
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Re: '68 Camaro weak lights one side only, no L turn...

Quote:
Originally Posted by Easy Rider View Post
so I soldered ground wires to both brake light sockets, no change.
Did you run the GND wire all the way back to the battery, or just ground it to the body in the trunk?

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post #7 of 10 (permalink) Old Nov 2nd, 18, 09:24 AM
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Re: '68 Camaro weak lights one side only, no L turn...

The reason the bulbs are staying on instead of blinking is because the flasher expects to see a certain amount of current before it will start flashing and it's not seeing that current. It's the same type of problem that occurs when incandescent bulbs are replaced with LED bulbs. The LED bulbs require much less current so they won't work with the stock flasher.

So that means you either still have a bad ground on the left side in the front or the rear or there's a bad connector connection that has become resistive enough that it causing enough of a voltage drop to limit the current below the flasher current limit threshold. There are three connectors that could be the problem, the steering wheel column connector, the 8 pin body harness connector, or the bulk head connector. I would try replugging each one to see if it changes anything.
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post #8 of 10 (permalink) Old Nov 3rd, 18, 05:20 AM Thread Starter
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Re: '68 Camaro weak lights one side only, no L turn...

Quote:
Originally Posted by blitzer454 View Post
The reason the bulbs are staying on instead of blinking is because the flasher expects to see a certain amount of current before it will start flashing and it's not seeing that current. It's the same type of problem that occurs when incandescent bulbs are replaced with LED bulbs. The LED bulbs require much less current so they won't work with the stock flasher.

So that means you either still have a bad ground on the left side in the front or the rear or there's a bad connector connection that has become resistive enough that it causing enough of a voltage drop to limit the current below the flasher current limit threshold. There are three connectors that could be the problem, the steering wheel column connector, the 8 pin body harness connector, or the bulk head connector. I would try replugging each one to see if it changes anything.
Very helpful, makes perfect sense. Thank you.
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post #9 of 10 (permalink) Old Nov 3rd, 18, 05:54 AM
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Re: '68 Camaro weak lights one side only, no L turn...

I have to start the engine to spin the alternator to get the turn signals to work on the 68RS. The flashers will work however without the engine running. Don't know why.
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post #10 of 10 (permalink) Old Nov 3rd, 18, 07:39 AM
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Re: '68 Camaro weak lights one side only, no L turn...

Quote:
Originally Posted by R66 View Post
I have to start the engine to spin the alternator to get the turn signals to work on the 68RS. The flashers will work however without the engine running. Don't know why.

Are you saying the blinkers don't blink unless the alternator is spinning, but the 4-way flashers work fine regardless of the state of the alternator? If so the reason the 4-way flashers always work is because there are more paths to ground so the current will be above the current limit threshold of the flasher. When the alternator is spinning the battery voltage will be around 13.5V - 14.3V which also increases the current in the flasher circuit when the blinkers are activated. When the alternator is not spinning the battery voltage is only around 12V.



However since neither left or right blinkers are working when the engine is off, I suspect the problem is more likely to be a bad flasher or poor steering column connection.


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