[Cobra 29]

On my ERA I kept the firewall solenoid when I installed a mini-FMS starter which has a solenoid on it. Keeping the firewall solenoid allows you to keep the "S" and "I" wires and connections.

Original wiring

Heavy cable from battery to battery terminal on solenoid,two small wires connect to the S and I terminals on the solenoid, and a heavy cable from the "starter" terminal on the solenoid to the original (non-solenoid) starter.

New wiring

Heavy cable from battery to positive (larger) terminal on the new mini-starter then second heavy cable from same starter terminal to "battery" side of the firewall solenoid to feed battery power to remaining circuits. Keep the same small wires to the S and I terminals on the firewall solenoid. Last connection: run "trip" or small gauge wire from "starter" side terminal on the firewall solenoid to the solenoid terminal on the new starter.

The electrical load on the firewall solenoid is drastically reduced. You keep the firewall solenoid in place for looks and to keep current electrical connections.