Civic, CR-V & Prelude
- On Civic and CR-V, check defogger timer circuit input to rear defogger switch. Check defogger switch. See DEFOGGER SWITCH TEST under COMPONENT TESTS.
- On Prelude, check defogger timer circuit. See REAR DEFOGGER TIMER CIRCUIT under CIRCUIT TESTS. Check for poor connection, open or short in Yellow/White wire.