Turn signal WTF

Since the car runs, the "run" contact (IGN1) in the ignition switch is good, must be further down. If ANY accessories work, it is not the ignition switch.

............In this case the shop manual might be wrong. They show the flasher power is UN fused and comes right off the main black accessory wire. (splice)

But the 71 book shows the flasher power is tapped off the radio connector, so that fuse would supply it