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Member
Black box ground wire
My question is , with an aluminum boat can you ground anywhere or should I run another wire to the battery, or can I splice into the ground wire all ready coming from the wiring harness.
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Member
Most run it to the battery.
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Always run ground wires straight to the battery in aluminum boats. If you don't, you run the risk of introducing electrolysis to the hull. I have welded on several boats that had holes all in them from it.
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I went to the ground on the power cable. It goes to the battery.