Test 26A - Both Headlamps Out
NOTE:
For connector terminal identification, see CONNECTOR IDENTIFICATION
. For wiring diagram, see WIRING DIAGRAMS
. Perform TEST VER-1 after each repair.
- Turn ignition switch to OFF position. Disconnect low beam headlamp relay. See Figure . Check, clean and repair connections as needed. Turn ignition switch to ON position. Put DRB in voltmeter mode. Measure voltage at headlamp relay connector terminal "A" (Red/White wire). If voltage is more than 10 volts, go to step 4). If voltage is less than 10 volts, go to next step.
- Measure voltage at headlamp relay connector terminal "B" (Red/White wire). If voltage is more than 10 volts, repair open Red/White wire between headlamp relay terminal "B" and power distribution center. If voltage is less than 10 volts, go to next step.
- Inspect headlamp system 40-amp fuse (second fuse from right on bottom row) at power distribution center, located in front of left strut tower. See Figure . If fuse is okay, go to TEST 26B. If fuse is open, go to TEST 26C .
- If voltage is more than 10 volts in step 1), measure voltage at headlamp relay connector terminal "B" (Red/White wire). If voltage is less than 10 volts, repair open Red/White wire between headlamp relay connector terminal "A" and power distribution center. If voltage is more than 10 volts, go to next step.
- Put DRB in ohmmeter mode. Ensure headlamp switch is in ON position. Measure resistance at headlamp relay connector terminal "C" (Orange/White wire). If resistance is less than 5 ohms, go to step 8). If resistance is more than 5 ohms, go to next step.
- Disconnect left pod switch connector. See Fig 1 . Check, clean and repair connections as needed. Measure resistance at left pod switch connector terminal No. 13 (Black/Orange wire). If resistance is more than 5 ohms, repair Black/Orange wire between left pod switch connector and ground for open to ground. If resistance is less than 5 ohms, go to next step.
- Using an external ohmmeter, measure resistance between left pod switch connector terminal No. 12 (Orange/White wire) and headlamp relay connector terminal "C" (Orange/White wire). If resistance is more than 5 ohms, repair open Orange/White wire between left pod switch connector and headlamp relay connector. If resistance is less than 5 ohms, replace headlamp switch, located in left pod switch.
- If resistance is less than 5 ohms in step 5), use an external ohmmeter to measure resistance between headlamp relay connector terminal "D" (Violet/White wire) and fuse No. 17 (Violet/White wire). See Figure . If resistance is less than 5 ohms, replace low beam headlamp relay. See Figure . If resistance is more than 5 ohms, repair open Violet/White wire between headlamp relay connector and fuse panel.