[davids2toys]

Originally Posted by patrickt

Both with the engine running and not running -- for this it doesn't make a difference. With the negative battery cable going to the passenger side head, and the lights and fans having their negative path via the frame, the majority of the current has to run through that one black wire (or something not as good, like motor mounts, brake components, etc.) Adding supplementary grounds, one a strap from the intake manifold to a bolt on the firewall, and the second was a beautifully crafted 4 gauge wire, with crimped and torch soldered ends, that goes from the negative terminal of the battery to the frame itself. Doing all of that brought the current that was running through that little black wire down to one third of what it originally was. And, it could have just been my imagination, but the starter seemed to crank better as well.

OK, good info. I saw your thread with the On the 04 neg lead. I would like to do the same, only in more flexible heavy braid.
I have been trying to learn about clamp meters that measure DC amp all afternoon. There is a plethora of junk out there. Do you have a good inexpensive one you could recommend?
Dave