Autozone Electrical System Check (Reversed polarity)

Question

I have a 2006 Toyota Corolla which the Toyota dealership claims has damage caused by jumping the car incorrectly. They say the car was damaged due to reversed polarity. I took the car to the local Autozone to have a free electrical system check before taking it to the Toyota dealership. Is it possible that the Autozone tech caused the damage by incorrectly testing the electrical system? Thanks for your help.

Answer 1

By reversing th polarity, the stereo would probably smoke up and the ecu could have been damaged.  

Answer 2

With Toyota's if the polarity is reversed it will blow the 100 amp fuse and usually the 15 amp EFI.  These protect the more expensive components.  I have personally seen the polarity reversed briefly with no sparks, smoke or battery explosion.  Jumper cables are hooked up every day with no battery explosions,but there is always the possibilty. I have never seen anything else cause the 100 amp fuse to blow. So the answer is yes it is possible. Look at the battery posts and cable ends to see if there are arc marks or melted lead.

Answer 3

mroe likely then not you just need a new battery. check al the fuses and relays as well.

Answer 4

If the polarity was reversed when you jumped the car, you would have seen sparks everywhere and possibly had the battery explode.