300ZX (Z31) Forums Dedicated to 84-89 ZCars otherwize known as the Z31's

Incorrect polarity

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Old 11-14-2016, 08:46 PM
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Incorrect polarity

Long story short:

Boosted my car. Friend reversed polarity on booster cables.

Care won't start. There was smoke coming from the ecu which I've confirmed is burnt. I also burnt a fuseable link.
Is there anything else that might have been destroyed that I should look at.

Might be worth adding that the engine doesn't even try to turn over. Just a clunk sound and a drop in voltage.
Also, the warning lights are all on, regardless if the key is in the ignition.
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Old 11-15-2016, 06:48 AM
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Click: https://www.zdriver.com/forums/280zx...l-issue-41021/
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Old 11-15-2016, 05:05 PM
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OY..So sorry my Z friend!
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Old 11-17-2016, 07:11 PM
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the jump box didn't have the polarity sensor on the pos clamp?
think you will have to see if the starter jumps , test the starter relay , on the just clicks
after you find a ECU... that is.
I.ve worked places where the porter is a no nothing teen that does this
but then the service manager asked me where the valves in the engine were.
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