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Test 59A - Both Headlamps Out

NOTE: For connector terminal identification, see CONNECTOR IDENTIFICATION . For wiring diagram, see WIRING DIAGRAMS - 3.0L article in ENGINE PERFORMANCE. Perform TEST VER-1 after each repair.
  1. Turn ignition off. Disconnect low beam headlamp relay. See Figure. Check, clean and repair connections as needed. Turn ignition on. Using scan tool in voltmeter mode, check voltage on 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.
  2. Check voltage on 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 (PDC), located in front of left strut tower. If voltage is less than 10 volts, go to next step.
  3. Inspect headlamp system 40-amp fuse (second fuse from right on bottom row) at PDC. See Figure. If fuse is okay, go to TEST 59B. If fuse is open, go to TEST 59C .
  4. Check voltage on 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, located in front of left strut tower. If voltage is more than 10 volts, go to next step.
  5. Ensure headlamp switch is on. Using scan tool in ohmmeter mode check resistance of 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.
  6. Disconnect left pod switch connector. See Figure. Check, clean and repair connections as needed. Check resistance of 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.
  7. Using an external ohmmeter, check 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.
  8. Using an external ohmmeter, check 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.
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