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Both Headlight Doors Always Open

  1. Check headlight system operation. If headlights operate properly, go to next step. If headlights do not operate properly, locate and repair problem in headlight system. See WIRING DIAGRAMS  .
  2. Turn headlights OFF. Disconnect 5-pin Headlight Doors Module (HDM) connector C1. See Figure . Using DVOM, check voltage between HDM connector C1, terminal "C" (Dark Green wire) and ground. If battery voltage exists, go to next step. If battery voltage does not exist, go to step 5).
  3. Check for continuity between HDM connector C1, terminal "D" (Black wire) and ground. If continuity exists, go to step 5). If continuity does not exist, repair open in Black wire between connector C1 and splice pack No. 100. See WIRING DIAGRAMS  . Recheck system operation.
  4. Replace HDM. Recheck system operation.
  5. Disconnect underhood electrical connector C3. Using DVOM, check continuity between underhood electrical center connector C3, terminal "B" (Orange wire) and HDM connector C1, terminal "C" (Orange wire). If continuity exists, go to next step. If continuity does not exist, go to step 9).
  6. Disconnect underhood electrical center connector C2. Using DVOM, check voltage between underhood electrical center connector C2, terminal E6 (Dark Green wire) and ground. If battery voltage exist go to next step. If battery voltage does not exist, go to step 8).
  7. Replace underhood electrical center. Recheck system operation.
  8. Disconnect connector C209. See WIRING DIAGRAMS  . Check continuity in Dark Green wire between underhood electrical center connector C2, terminal E6 and connector C209 terminal "T". If continuity exists, go to next step. If continuity does not exist, repair open in Dark Green wire between underhood electrical center connector C2 and connector C209.
  9. Replace headlight switch. Recheck system operation.
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