Turn Signal/Hazard Relay Input Test
- Remove turn signal/hazard relay from underdash fuse/relay box. Check turn signal/hazard relay and turn signal/hazard relay connector for loose, damaged or corroded terminals. If problem exists, repair as necessary and retest system. If problem does not exist, go to next step.
- Turn hazard switch on. Connect jumper wire between turn signal/hazard relay connector terminals No. 1 and 3. See Fig 1
. If hazard lights come on, go to next step. If hazard lights do not come on, check for poor ground (G201, G202, G401, G553 and G611). See COMPONENT LOCATIONS
. Check hazard warning switch. See HAZARD WARNING SWITCH TEST
under COMPONENT TESTS. Check for open in hazard warning light system wiring. See
EXTERIOR LIGHTS article.
- Turn ignition on and turn combination (turn signal) switch to right or left signal direction. If appropriate signal light comes on, go to next step. If appropriate signal light does not come on, test combination switch. See
STEERING COLUMN SWITCHES article. If problem exists, replace combination switch. If problem does not exist, repair turn signal circuit wiring. See
EXTERIOR LIGHTS article.
- Turn ignition off. Remove jumper wire. Check for continuity between ground and turn signal/hazard relay connector terminal No. 2 with hazard warning switch turned on and off. See Fig 1
. If continuity exists, go to next step. If continuity does not exist, check grounds (G401 and G402). Check for open in Black wire between underdash fuse/relay box and ground (G401). Repair as necessary.
- Turn ignition on. Turn hazard warning switch off. Measure voltage between ground and turn signal/hazard relay connector terminal No. 3. If battery voltage exists, go to next step. If battery voltage does not exist, check fuse No. 12 (7.5-amp) in underdash fuse/relay box. Check hazard warning switch. See HAZARD WARNING SWITCH TEST
under COMPONENT TESTS. Check for open in Yellow/Black wire between underdash fuse/relay box and hazard warning switch and Green/White wire between hazard warning switch and underdash fuse/relay box. Repair as necessary.
- Turn ignition off. Turn hazard warning switch on. Measure voltage between ground and turn signal/hazard relay connector terminal No. 3. If battery voltage exists, turn signal/hazard relay inputs are okay. If battery voltage does not exist, check fuse No. 53 (10-amp) in underhood fuse/relay box. Check hazard warning switch. See HAZARD WARNING SWITCH TEST
under COMPONENT TESTS. Check for open in White/Black wire between underhood fuse/relay box and hazard warning switch and Green/White wire between hazard warning switch and underdash fuse/relay box. Repair as necessary.
Courtesy of AMERICAN HONDA MOTOR CO., INC.