It is one of yours Jim. I was trying to give you a break, as you've fielded many of my questions on personal emails. A couple years ago, I put one of your "Early" boxes on. Ran normal. Almost a year back I put back on my old A and B boxes, storing yours. (<<one of my ignorant tries at trouble-shooting another possible problem?). Pretty sure my old A box has completely failed now (B-box still "BEEEEEPS"), so I will go back (and stay) with your nice 1-piece unit. Will work in garage on Saturday(s), as have read your tips above, plus your instruction sheet, but another question>. My stock wiring loom has a 2-wire connector where 1 of its wires is bare/strands of thin copper, no colored covering. Do I assume this bare one serves as another ground wire? thx again. Mark