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Home >> GMC >> 1998 >> C3500 HD 6.5 F, Automatic >> Repair and Diagnosis >> Body & Frame >> Door Locks >> Keyless Entry System - Remote >> Testing >> Left Front Power Door Does Not Unlock Using Transmitter

Left Front Power Door Does Not Unlock Using Transmitter

  1. Disconnect left front door lock motor connector. Connect test light between ground and left front door lock motor connector terminal "B" (Tan wire). Push UNLOCK button on remote transmitter. If test light illuminates, go to step 3). If test light does not illuminate, go to next step.
  2. Disconnect remote control door lock receiver connector. Connect self-powered test light between remote control door lock receiver connector terminal "A" (Tan wire) and left front door lock motor connector terminal "B" (Tan wire). If test light illuminates, replace remote control door lock receiver. If test light does not illuminate, repair open in Tan wire between door lock relay and door lock motor.
  3. Connect test light between battery voltage and left front door lock motor connector terminal "A" (Gray wire). If test light illuminates, replace left front door lock motor. If test light does not illuminate, go to next step.
  4. Disconnect door lock relay connector. Connect self-powered test light between door lock relay connector terminal "E" (Gray wire) and left front door lock motor connector terminal "A" (Gray wire). If test light illuminates, replace door lock relay. If test light does not illuminate, repair open in gray between door lock relay and left front door lock motor.