Horn works perfectly. Horn relay is located under the dash near the headlight switch. It has 3 wires going to it. My research showed that in 72 they moved the horn relay to inside the car in this location. Can't find anything on the buzzer for 72.
There is a molded connector located above and in front of the fuse box with 3 wires, 12v, ground and ground from the key switch. My meter reads a ground with key in and door open. Clears when door shuts or key removed. It works perfectly. In search of the buzzer that plugs into this connector.
Only schematic I can find it 70-71 and does show it in the horn relay. Can't find schematic on 72. I bought the car from original owner in 1984 so am confident this is how the factory wired 72's
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