[coilover]

Kind of along the line of what GM does but a bit higher cost. I use a horn relay mounted under the solenoid so just one longer wire to the coil is needed. A wire from the hot side of the solenoid is run to one terminal on the relay, from another to the coil, and the third wire is run to the starter button terminal on the solenoid. Since both the starter button and horn relay are activated by grounding the full six volts passes to the coil just while the starter is engaged. There is no back feed from the relay to keep the engine running when switched off.