All I can offer is what is on an 81. It is a light blue wire from the choke heater relay under the console, goes thru the firewall on the drivers side, goes down the fender to the alternator, and crosses over there with the alternator/vacuum lines.
In reality, if not found, any fused keyed on hot wire will do. I believe the yellow wire to the wiper motor fits the bill.
In reality, if not found, any fused keyed on hot wire will do. I believe the yellow wire to the wiper motor fits the bill.