Here's what Bill Taylor just sent me:
Larry,
I have a '74 (#6338). I used the big wiring diagram when I made the individual diagrams.
There are wiring differences between early and late cars and this is one of them.
Early cars also differ in the ballast resistor/ignition coil wiring and the radiator fan wiring.
Your backup lights are fed via Fuse #3 and are hot whenever the parking or headlights are on.
Have fun,
SOBill Taylor
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