Defogger Will Not Turn Off
- Turn ignition off. Unplug rear defogger relay connector. Using a DVOM, measure resistance between Black/Orange wire terminal and Black/Blue wire terminal on relay. If resistance is greater than 10,000 ohms, go to next step. If resistance is less than 10,000 ohms, replace relay.
- Test rear defogger switch. See DEFOGGER SWITCH under SYSTEM TESTING. If defogger switch is okay, repair short to ground in Purple wire between defogger relay and defogger switch.