Ignition Switch Test
- Check main circuit breaker in interior fuse box. Fuse box is located just above left kick panel. If circuit breaker is open, check and repair circuit as necessary.
- Reset circuit breaker. Remove trim cover, lower panel and defroster duct to gain access to steering column wiring. Check for short to ground. Turn ignition switch to OFF position. Disconnect Black wire between main fuse panel and ignition switch. See Fig 1. Using an ohmmeter, measure resistance between Black wire and ground. If resistance is less than 5 ohms, service Black wire.
- If resistance is more than 5 ohms, check for power supply to ignition switch. Turn ignition switch to ON position. Using a voltmeter, measure voltage on Black wire at ignition switch. If voltage is less than 10 volts, service Black wire.
- If voltage is more than 10 volts, check ignition switch operation. Disconnect ignition switch connectors. Using an ohmmeter, measure resistance through ignition switch between Black wire terminal at switch and at terminal for wire color specified in following steps. See Fig 1.NOTE: If any of tests 5-8 fails, replace ignition switch.
- Turn ignition switch to OFF/LOCK position. Check Blue, Black/White, and Black/Blue wires for resistance more than 10,000 ohms.
- Turn ignition switch to ACC position. Check Blue wire for resistance less than 5 ohms. Also check Black/White and Black/Blue wires for resistance more than 10,000 ohms.
- Turn ignition switch to ON position. Check Black, Black/White, Black/Blue and Black/Red wires for resistance less than 5 ohms.
- Turn ignition switch to START position. Check Black/Blue, Black/Red and Black/White wires for resistance less than 5 ohms. Check Blue wire for resistance more than 10,000 ohms.
- If all tests pass, check for continuity from ignition switch to fuse panel. Turn ignition switch to OFF position. Use an ohmmeter to check resistance between ignition switch and interior fuse panel in Black/White and Blue wires. If more than 5 ohms, service appropriate wire.
- If less than 5 ohms, check continuity from ignition switch to neutral safety switch (A/T) or clutch engage switch (M/T). Use an ohmmeter to check resistance between ignition switch Black/Blue wire and neutral safety switch or clutch engage switch. If more than 5 ohms, service Black/Blue wire. If less than 5 ohms, review testing.