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On my 2008 camry I reversed polarity when connecting the battery. Reconnected with the correct polarity, but the car will not start/crank! Have I caused damage that cannot be repair with a fuse etc?

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More than likley
you could have fried the ecm

Posted on May 20, 2017


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Jump start with reversed cables. Now car wont start? Ideas?

Oh, oh. U did something stu--d and trashed the electrical system of the car with the reversed polarity. There is no telling just what you trashed - hope you have lots of dinero for the diagnostics and/or repair.

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Changed the battery in 2008 camry, when I reconnected the cables to battery the alarm goes off and car will not start. Can not locate a toggle switch or any other switch under dash. Also tried the...

Are you sure you have battery polarity correct? Positive is usually red, negative and connection to frame is usually green. Car may be smart enough to complain about this kind of thing. The electronics would get fried if installed improperly. Double check. Check Owner's manual, troubleshooting. Google your problem. Other owners may have had similar problems.

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Did they reverse polarity on you ? It's possible that they did just that, and when reconnected it, fried your electronics.

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reversed polarity,check fuses. check the system for burnt wires also !
Always hook up your battery terminals correctly, as the alternator may be damaged if the battery is hooked up backward. jump start car, if it will. there should be at least 13.7 to 14.2 volts at battery posts while its running. if alternator is ok.

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Car wont start after battery was disconnected then reconnected

If you're sure that you connected right (correct polarity) you should check the ignition fuse that is almost always located inside the car near the foot pedals to the left.

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