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In my pickup I ran A heavy neg wire from the 8 pill, through a plug in the cab to the frame.

The b+ ran from the battery up front to the amp.

It was 2|0 welding cable, maybe overkill, but I had a lot of it on hand at the time.

There should be a factory ground cable from the block to the frame.

I have never had a problem using the frame for ground.

Make sure you clean the connection point down to bare metal.



73

Jeff