F8 Check Power to Main Relay Coil

- Remove main power relay.

- Turn ignition switch ON.

Relay Terminals:

- Measure voltage between main relay connector pin 86 and ground.

- Is voltage reading over 10 volts?

YES -- Go to F9. F9 Check Power to Relay

NO -- Service circuit 601 (LB/PK). Restore vehicle. Retest system.