Master Switch Circuit
- Remove escutcheon and housing from master switch. Separate terminal plate by releasing retainer hooks to expose terminal ends.
- Turn ignition switch on. Using a 12-volt test lamp, connect one lead to Black wire and other lead to Red terminal. Repeat test at second Black wire.
- If lamp does not light in either test, remove lead to Black terminal and connect to chassis ground. If lamp lights, an open exists between master switch and ground. If lamp does not light, it indicates a defective circuit breaker or an opening in the Red wire from circuit breaker to master switch.