Join Date: Nov 2000
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I'd run it from a bolt on the body of the alternator right back to the negative terminal of the battery. I have a ground cable from the negative terminal to a bolt through the firewall where I have a second cable to the dash (metal dash on a cj). It might be overkill, but who could fault someone having separate grounds to the block, grill, firewall, dash, starter solenoid, alternator? If you have the time, go for it. A common brass terminal on the firewall might be a good place to branch out from for smaller secondary grounds, and I'd run a heavy separate one to the block and alternator.