My friend had a shop install a wiring harness and gauge panel in his '64 El Camino, replacing lights with gauges. When he got it back a number of things didn’t work. The tech smoked the amp gauge, melting the 14 gauge or so coil wire inside the gauge. The shunt wires were hooked together onto a terminal of the horn relay. Smoke must have poured out of the dash. The wire inside the gauge is open by about 1/4 inch.
The Tach doesn’t work either. Sadly I don’t know if he hooked it up correctly, nor do I know if incorrect hookup definitely blows up the tach. The tach has a simple hookup, 2 terminals, one is hot, one is sense. One is high center, the other is low drivers side. Both terminals have red insulators, the top terminal has a single number 1 wire marker beside it. The bottom has a pencil G. (my assumption was someone thought it was ground, but ground is through the chassis.
So anyone know the hookup diagram for a 64 El Camino, or Chevelle Tachometer? To potentially save some bandwidth, I understand GM never created a print for the tach wiring, I sure looked enough.
Thanks for the help!
Dan