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Old 01-30-2011, 04:26 PM
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1985 Corvette electrical issue.

Dealing with a `85 Corvette that`s mostly been restored. I`ve seen many GM`s have this problem in the past but I never dove into the issue. Since this is a Corvette I`m not quite willing to overlook it.
However, when the headlight switch is pulled out, the left side turn signal indicator illuminates. It does not blink, it just illuminates. The running light on the front left side is dim compared to the right, both of these issues turned up at once. We had thought perhaps the issue was in the turn signal assembly but that led to a dead end, as it can be completely unplugged and the same thing happens. I`m sure since so many GM`s have had this problem in the past somebody knows the fix. I hate electrical issues as I`m a drivetrain guy. Any help`s greatly appreciated.

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Old 01-31-2011, 09:54 AM
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In my experience it has either been a bad ground or a bad bulb somewhere , Or a wire in the steering column has a bad spot it it somewhere.JMO I don't like electrical problems either.


Cole
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Old 01-31-2011, 10:41 AM
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sounds like a ground problem see. if you can find a headlight wiring diagram those year vette have relays for lights high ,low, and headlight doors . feedback from front marker light ground has been common here with me
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Old 01-31-2011, 02:28 PM
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Try removing the left front park/turn bulb. The marker light and TS indicator should go off.
This indicates that the ground for the left front park/turn bulb is not connected.
First, replace the bulb. If that does not help proceed as follows.
It could be the socket shell is corroded or a wire is not making good a connection. Since the Corvette is fiberglass, ground wires are required to run to a central ground location. It may be necessary run a new wire if the break cannot be found.
The symptom you describe is (3) lamp filaments is series thus the dim light. The (2) filaments in the park/turn bulb and the filament in the turn indicator bulb. This is common with the dual filament type of bulb where a common ground is used for both filaments.

vicrod
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Old 02-01-2011, 06:00 PM
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It turned out to be the socket. We replaced it and everything works as it should now. Thanks guys.
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Old 02-02-2011, 03:56 AM
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Good to hear you got it fixed
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