1976. V8 Conversion, but the starter wiring is (near) stock.
It did this once in the past, and has done it again. Turn the key to the start position, hear a relay click under the dash, but the starter doesn't engage and spin. If I jump the big cable at the starter to the terminal on the solenoid that the brown wire is connected to, the starter spins and starts the car.
The last time it healed itself after the car sat for a couple of hours. It hasn't been that long now, but I need to find what the problem is and fix it.
I have jumpered around the original seat belt interconnect.
Ideas?
(BTW, electricity is magic to me so keep it simple )