What type of damage could occur & what are the related cost repairs from reverse polarity, while jump-starting a car?


Asked by IvanBroce Feb 25, 2013 at 12:47 PM about the 2000 Nissan Xterra XE V6 4WD

Question type: Maintenance & Repair

My wife reversed the jump cable connectors, while unsuccessfully trying to start my 2000 Nissan XTerra XE (4x4 - V6). During the attempt she reported the car making some "weird noises" :-o and I told her to stop; my neighbor confirmed my suspission on reverse polarity. However, after correcting the polarity, the engine wouldn't even turn. What are the possible damages and approx related repair costs?

2 Answers


first battery gets a little cooking might survive, then alternator gets a reverse blast ov voltage against diodes, if short duration may be ok[ive done this many times till now i paint big + and- on battery,hopr radio was off [diodes] also a diode in hood fuse box and check the big 1 inch fuses they may have saved yo but

1 out of 1 people think this is helpful.

The thing to really check for is the computer I think it's called an ECU. If this was shorted you will have to replace that the good news there would be that salvage yards may be a resource to finding one cheap as well as ebay. Just make sure to talk to the dealer to find out exactly what computer number you need.

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