I never noticed anything. I found it quite by accident. I got a new battery at Walmart, and they replaced the - clamp with a painted clamp. This was so bad it kept setting a transmission output code. It stalled and ran poorly. FTE and the scantool both said the most likely cause was a bad ground. I started inspecting all the grounds. I replaced the chassis to frame ground, and inspected the - battery to chassis ground wire expecting a problem there. Instead, I discovered the negative clamp paint and surmised that was where the problem was. Bought a lead clamp and installed it in the dark with a head mounted flashlight while it was snowing. If I hadn't had the problem with the painted clamp I may have never found it. If Walmart had installed a lead or brass connector, it would have solved the problem but I may never have figured out what the problem was. Bad grounds cause all kinds of weird problems.
