Reversed Wiring on Battery

Just Relax

New Member
Oct 3, 2006
10
Well I did a dumb thing and I am always very careful when hooking up the batteries. This time I got the positive and negative backwards. Before I realized it I switch the batteries on to check out the systems and a loud pop and blew the negative terminal right off the battery. The main leads to the start were warm to the touch and slightly blackend at the ends. I will be replacing the battery and was wondering what other issues I should be concerned about. Shorts? Melted wires? Any help would be appreciated.

Thanks,

Wes H.
 
Bye bye alternator rectifier bridge, bye bye!

Not knowing what type of boat you have, engines, or any other data, it's all a guess, but...

Connecting the battery in reverse forward biases the rectifiers so that they conduct. They can only conducts about 20 amps each, not over 100. They've gone bye-bye, I'll bet. You can try to change them; that's much cheaper than a new alternator. No guarantees about the voltage regulator module, though. EFI module is pretty well protected. Might find a blown fuse in the harness. Your electronics are generally protected by a diode that's normally reverse biases and will conducts and hopefully blow the fuse before the device is damaged, so you might find lots of blown fuses for your electronics.
 

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