Quote:
Originally Posted by JimSmith
Cliff,
The battery has a lot of energy, enough to glow the plugs and still spin that high compression engine over. If there was a dead short (V=IR, remember, and the heat generated is related to I squared, so if you have near zero resistance you get all the juice the battery can muster, which is a lot, and lots more than the circuit board can handle, thus the plasma) the fuse should protect the current carrying part of the circuit and the circuit card would become a fuse for whatever parts of the circuit it feeds. The fact that it apparently still works at all is sign of its robustness and a history of abuse. I agree you should change it. Jim
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Jim, Thanks. I don't presume to understand how it happened, but thanks for your input. I'm just looking for a miracle to get my car on the road again.
The question that came to my mind in reading your explanation is, why didn't the fuse blow on the current carrying side of the board, given the damage which is there?