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Test 60C - Parking Lamp Switch Output Circuit Short To Battery

NOTE: For connector terminal identification and wiring diagrams, see BODY CONTROL COMPUTER  section in this article. Perform TEST VER-1  VERIFICATION TEST after each repair.
  1. Disconnect headlight switch connector. If parking lamps turn off, replace parking lamp switch. If parking lamps do not turn off, go to next step.
  2. If vehicle is equipped with a parking lamp relay go to next step. Parking lamp relay is located behind dash, below parking lamp switch. If vehicle is not equipped with a parking lamp relay, repair short to battery voltage in Black/Yellow wire between BCM and headlight switch.
  3. Disconnect parking lamp relay. If parking lamps do not turn off, repair short to battery voltage in Black/Yellow wire between Body Control Module (BCM) and parking lamp relay. If parking lamps turn off, go to next step.
  4. Ensure ignition is off. Using an external ohmmeter, check resistance between parking lamp relay terminals "B" and "D". If resistance is less than 5 ohms, replace parking light relay. If resistance is 5 ohms or greater, go to next step.
  5. Disconnect BCM connectors. Using scan tool in ohmmeter mode, check resistance of parking lamp relay connector terminal "A" (Light Blue wire). If resistance is less than 5 ohms, repair short to ground in Light Blue wire. If resistance is 5 ohms or greater, replace the BCM.
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