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Test 64A - Parking Lamp Switch Output Circuit Short To Ground

NOTE: Perform TEST 61A  before proceeding with this test. For connector terminal ID, see CONNECTOR IDENTIFICATION  . For wiring schematics, see WIRING DIAGRAMS  in this article. Perform TEST VER-1 - VERIFICATION PROCEDURE  after each repair.
CAUTION: Always turn ignition off prior to disconnecting any module connector.
  1. Replace fuse No. 9. See Figure . Turn parking lamps on. If parking lamps illuminate without blowing fuse, repair is complete. If fuse blows, go to next step.
  2. Turn parking lamps off. Using scan tool in ohmmeter mode, measure resistance at fused B+ terminal (Pink/Red wire) on fuse No. 9 connector. If resistance is 5 ohms or greater, repair short to ground in Pink/Red wire and replace fuse. If resistance is less than 5 ohms, go to next step.
  3. Disconnect headlight switch connector. Using scan tool in ohmmeter mode, measure resistance at fused B+ terminal (Pink/Red wire) on fuse No. 9 connector. If resistance is 5 ohms or greater, replace headlight switch and replace fuse. If resistance is less than 5 ohms, go to next step.
  4. Disconnect instrument cluster connectors. If resistance is 5 ohms or greater, repair or replace instrument cluster as necessary and replace fuse. See appropriate INSTRUMENT PANEL article in the ACCESSORIES & ELECTRICAL section. If resistance is less than 5 ohms, go to next step.
  5. Disconnect Body Control Module (BCM) connectors. Measure resistance of fuse No. 9 connector (Pink/Red wire). If resistance is 5 ohms or greater, replace BCM and replace fuse. If resistance is less than 5 ohms, go to next step.
  6. If vehicle is equipped with parking lamp relay, go to next step. Parking lamp relay is located behind dash, below parking lamp switch. If vehicle is not equipped with parking lamp relay, repair short to ground in Pink/Red wire and replace fuse.
  7. Disconnect parking lamp relay. Using scan tool in ohmmeter mode, measure resistance at fused B+ terminal (Pink/Red wire) on fuse No. 9 connector. If resistance is 5 ohms or greater, replace parking lamp relay and replace fuse. If resistance is less than 5 ohms, repair short to ground in Pink/Red wire.
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