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DTC U1300: Class 2 Circuit Shorted To Ground

WARNING: This page is about a different car, the 1997 Oldsmobile Cutlass and 1997 Chevrolet Malibu. However, it is still accessible from the selected car via links, so may be relevant.
  1. Perform diagnostic system check. See DIAGNOSTIC SYSTEM CHECK  . After performing diagnostic system check, go to next step.
  2. Disconnect left instrument panel Bussed Electrical Center (BEC) connector C1. Disconnect EBCM connector. Using DVOM, measure resistance between terminal No. 12 (Purple wire) of EBCM connector and ground. See WIRING DIAGRAM  . If resistance is infinite, diagnose serial data line. See appropriate DATA LINK CONNECTORS article in WIRING DIAGRAM section. If resistance is not infinite, go to next step.
  3. Repair short to ground in Purple wire between EBCM and BEC. After repairs, perform DIAGNOSTIC SYSTEM CHECK  .
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