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1979 electrical issue

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Old Sep 11, 2011 | 12:36 AM
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Default 1979 electrical issue

Today, my '79's tach started jumping all over the place. When i hit the turn signal, my kenwood stereo momentarily shuts off, but immediately comes back on. Tonight when i hit my brakes, the same thing happens.Brake, lose stereo, regain stereo. It will be fine for awhile, then it starts doing it again. Any suggestions? Thanks.
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Old Sep 11, 2011 | 02:22 AM
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Default 1979 electrical issue

Check your instrument panel groung wire (ckt #150) at the left hindge pillar above the courtesy lamp. It's probably loose. They all connect to that same ground wire.
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Old Sep 11, 2011 | 08:14 AM
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Most stereos will shut down under a certain voltage. If you have the original alternator it's may not be meeting the electrical demand under heavy electrical loads. One way to over come the stereo problem is to use a relay to power it.
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Old Sep 12, 2011 | 01:42 AM
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SSG26K-Thanks, i will check the ground tomorrow. Tonight it did not do it.

thegazman- stereo worked fine until recently. It has been in the car for about 2 1/2 months. It is the original alternator . hopefully it will be a loose ground. the tach didn't act up tonight either, though i only drove it about 5 miles...
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Old Sep 12, 2011 | 09:55 AM
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I had the same problem, turned out to be a bad ground.
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Old Sep 12, 2011 | 10:26 PM
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jkjazzsax- the same instrument panel ground wire mentioned before ? thanks
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Old Sep 13, 2011 | 09:52 AM
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Originally Posted by springer89
jkjazzsax- the same instrument panel ground wire mentioned before ? thanks
No. I can't remember which electrical ground it was under the hood, but somehow a single ground wire had fallen on the header and semi-melted to it. Check around with a good flashlight. If it's melted to your headers or intake or similar, it may still ground (sort of) which caused my TAC and stereo to fail intermittently.
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Old Sep 16, 2011 | 01:59 PM
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the starter lead was loose and causing all the problems.
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