Test C: Ignition Switch Inoperative
Turn ignition off. Disconnect ignition switch 15-pin connector. Measure voltage between ignition switch 15-pin harness connector terminals B1 (Yellow wire), B3 (Yellow wire), B4 (Light Green/Violet wire) and B5 (Light Green/Violet wire) and ground. See Fig 1. If all voltage values are greater than 10 volts, replace ignition switch. See IGNITION SWITCH under REMOVAL & INSTALLATION. Test system for normal operation. If any voltage value is not greater than 10 volts, repair open circuit in suspect circuit. See appropriate wiring diagram in POWER DISTRIBUTION article in WIRING DIAGRAMS. Test system for normal operation.