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Test 133C - Bus Short To Battery

  1. Using an external ohmmeter, measure resistance between BCM Gray connector, terminal No. 6 (Tan wire) and BCM Bone connector, terminal No. 8 (Violet/Brown wire). If resistance is less than 5 ohms, repair short between Tan wire and Violet/Brown wire. If resistance is 5 ohms or greater, go to next step.
  2. Measure resistance between BCM Gray connector, terminal No. 6 (Tan wire) and BCM Bone connector, terminal No. 7 (White/Black wire). If resistance is less than 5 ohms, repair short between Tan wire and White/Black wire. If resistance is 5 ohms or greater, go to next step.
  3. Measure resistance between BCM Gray connector, terminal No. 3 (Tan/Red wire) and BCM Bone connector, terminal No. 8 (Violet/Brown wire). If resistance is less than 5 ohms, repair short between Tan/Red wire and Violet/Brown wire. If resistance is 5 ohms or greater, go to next step.
  4. Measure resistance between BCM Gray connector, terminal No. 3 (Tan/Red wire) and BCM Bone connector, terminal No. 7 (White/Black wire). If resistance is less than 5 ohms, repair short between Tan/Red wire and White/Black wire. If resistance is 5 ohms or greater, go to next step.
  5. Measure resistance between BCM Bone connector, terminals No. 5 (Yellow/Red wire) and No. 8 (Violet/Brown wire). If resistance is less than 5 ohms, repair short between Yellow/Red wire and Violet/Brown wire. If resistance is 5 ohms or greater, go to next step.
  6. Measure resistance between BCM Bone connector, terminals No. 5 (Yellow/Red wire) and No. 7 (White/Black wire). If resistance is less than 5 ohms, repair short between Yellow/Red wire and White/Black wire. If resistance is 5 ohms or greater, go to next step.
  7. Using scan tool in ohmmeter mode, measure resistance on BCM Bone connector, terminal No. 14 (Black/Light Green wire). If resistance is 5 ohms or greater, repair open Black/Light Green wire. If resistance is less than 5 ohms, go to next step.
  8. Using scan tool in ohmmeter mode, measure resistance on BCM Bone connector, terminal No. 15 (Gray/Tan wire). If resistance is 5 ohms or greater, repair open Gray/Tan wire. If resistance is less than 5 ohms, replace BCM.
NOTE: 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 switch to OFF position prior to disconnecting or connecting any module connector.
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