I've got a '78 Bronco turn signal switch I need to make compatible with my '77 harness. Has anyone who has done this swap made a diagram of switch side of the semi circular plug. One problem is the '78 horn relay, that schematics show as needing 4 wires. The '74-'77 relay only has 3. The horn switch has 2 wires like the pre '74 EBs that had no relays. Should one of the 2 simply go to ground, making the circuit operate like the '74-'77 horn switch. All this seems to have been done function the '78 up cruise control that EBs didn't have.
Some of the remaining wires to the '78 plug are just like those on the '77 plug. Others aren't. Any help would be great.
Some of the remaining wires to the '78 plug are just like those on the '77 plug. Others aren't. Any help would be great.
