Question about 1972 Chevrolet Corvette

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Accidently hooked battery cable up backwards on 77 corvette and now car will not start.

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  • keith_justus
    keith_justus Mar 01, 2012

    Did the same thing to my 74 corvette STUPID. Didn't realize Irotated the battery as I put it in. Replaced all the fuses, and one inline down by the Starter. Everything works except Oil Pressure and Temporatire gauges.

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  • Chevrolet Master
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Did you mean that the battery was connected in reverse? if so this would have damaged the electronics , and ended with the failure of ignition system , fuel pump .

Posted on Apr 02, 2011

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Full electrical power loss to everything.


Were the cables accidently hooked up backwards ? The main fuse at the fuse block may have blown. Check where your positive cable hooks at the main fuse block and there should be a fuse rated over 100 amps for the fuse block feed.

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1978 corvette battery hooked up backwards now wont start at all


You didn't list any details of what you tested, found, or replaced, if any. The first place that I would start is at the battery and the starter. Look for a blown in-line fuse or fuseable links. These earlier made cars were pretty simple but they were still using some polarized transistor circuits. While you are inside the fuse box (checking for blown fuses), please check for damaged diodes. I don't think your car has any but just in case. If you don't know what they are. Diodes look like a blade fuse but are black and have an arrow on the top of it. If you write back please clarify your description. I don't know if you mean to say that your car will start and run if you by-pass the ignition system. Sending voltage the wrong way can damage so many parts. It can fry the alternator, the ignition control module, wiring, in-line fuses, fuses, diodes, and the radio. This repair will take some time. Please let me know if I can answer anymore questions. Please be as specific and detailed as you can, Good luck.

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If you have a newer audio system you will have lost your radio codes. We can not provide the codes for anti-theft reasons. Activation Codes must be from the car dealer or audio system retailer.
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