Erratic Ammeter

First one of these problems I found was "about" 1970-72 in the apt parking lot of a friend, working on his 68RR. At the time I owned a 69 383, and would later own my 70 440-6. His ammeter was doing this, and it turned out to be the welded splice. We ended up with the dash all torn apart and the harness half pulled out, he figured I'd NEVER get it back, and I wasn't too sure either!!!! I was the "hero" for awhile after that. Since that time I've been privy to maybe 10 or a dozen bad welded splices in various people's cars, some of them on here. This splice is up under the dash by the cluster, a few inches from the ammeter black wire. You simply have to pull the cluster, access the harness, and untape until you find the splice.