Let me try... On A 80 280ZX power comes from the fuse box to the remote switch not the mirrors. This is 1 of 5 wires to the switch. 2 of 5 wires is a ground wire at the switch. 3 of 5 goes to the coil of the mirror for up/down function. 4 of 5 and 5 of 5 go to the mirror and are for l/r and pwr.
At the mirror are 4 wires. 1 of 4 is a ground wire from the coil at the mirror. 2 of 4 is a wire from the coil that goes to the switch for the up/down function. 3 of 4 and 4 of 4 are for l/r and pwr that go to the switch.
LARRY