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DTC 21/31: Courtesy Lights Feed Circuit Shorted To Ground: Testing

NOTE: Incorrect installation of aftermarket electronic equipment may effect system operation.
  1. Turn ignition switch to OFF position. Remove and check COURTESY fuse No. 8 (20-amp) from instrument panel fuse block. If fuse is open, go to next step. If fuse is okay, go to step  3 .
  2. Check for short to ground in Orange wire between BCM and instrument panel fuse block. Repair wire as necessary. If wire is okay, replace COURTESY fuse.
  3. Disconnect BCM connector C2. Connect a test light between BCM connector C2 terminal "B" (Orange wire) and ground. See Figure . If test light comes on, go to step  5 . If test light does not come on, go to next step.
  4. Repair open in Orange wire between BCM and instrument panel fuse block and/or open in Red wire between instrument panel and fusible link "E".
  5. Ensure glove box is closed. Using DVOM, check continuity between BCM connector C2 terminal "E" (Dark Blue/White wire) and ground. If resistance is zero ohms, go to next step. If resistance is more than zero ohms, go to step  7 .
  6. Repair short to ground in Dark Blue/White wire between BCM and appropriate interior light.
  7. Replace BCM. See BODY CONTROL MODULE (BCM)  under REMOVAL & INSTALLATION.
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