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Home >> GMC >> 1997 >> C3500 HD 6.5 F, Automatic >> Repair and Diagnosis >> Body & Frame >> Door Locks >> Keyless Entry System - Remote >> Testing >> Keyless Entry Does Not Operate

Keyless Entry Does Not Operate

  1. If right door lock operates from either power door lock switch, go to next step. If right door lock does not operate from either power door lock switch, see DOOR LOCKS - POWER article.
  2. If rear window operates from vehicle's rear window release switch, go to next step. If rear window does not operate from vehicles rear window release switch, problem is not remote keyless entry related.
  3. If left power door lock operates from either of vehicle's power door lock switches, go to step 8). If left power door lock does not operate from either of vehicle's power door lock switches, go to next step.
  4. Connect jumper wire between keyless entry receiver connector terminal "A" (Tan wire) and ground. If left power door lock does not lock from either power door lock switch, go to step 6). If left power door lock now locks from either power door lock switch, go to next step.
  5. Connect self-powered test light between Black wire at keyless entry receiver connector and ground. If test light comes on, replace keyless entry receiver. Reprogram replacement receiver. See PROGRAMMING PROCEDURE  . If test light does not come on, repair open circuit in Black wire.
  6. Connect test light between left front door lock motor terminal "B" (Gray wire) and ground. Hold either power door lock switch in LOCK position. If test light comes on, go to next step. If test light does not come on, repair open circuit in Gray wire.
  7. Connect test light between left front door lock motor connector terminals "A" (Tan wire) and "B" (Gray wire). Hold either power door lock switch in LOCK position. If test light comes on, replace left door lock motor. If test light does not come on, repair open circuit in Tan wire.
  8. If luggage compartment release function operates, go to next step. If luggage compartment release function does not operate, go to ONLY REAR WINDOW CARGO DOOR RELEASE FUNCTION DOES NOT OPERATE  .
  9. If any transmitter functions operate, go to step 11). If any transmitter functions do not operate, go to next step.
  10. Connect a jumper wire between program connector terminals. Using a known-good transmitter, operate transmitter by pressing a single button once. Disconnect jumper wire from program connector. If known-good transmitter operates all remote keyless entry functions, repair is complete. If transmitter does not operate all remote keyless entry functions, go to TRANSMITTER FUNCTIONS DO NOT OPERATE  .
  11. Connect test light between keyless entry receiver connector terminal "B" (White wire) and ground while pressing either power door lock switch in UNLOCK position. If test light comes on, go to next step. If test light does not come on, repair open circuit in White wire and reprogram keyless entry receiver. See PROGRAMMING PROCEDURE  .
  12. Connect test light between keyless entry receiver connector terminal "R" (Light Blue wire) and ground while pressing either power door lock switch in LOCK position. If test light comes on, replace keyless entry receiver. If test light does not come on, repair open circuit in Light Blue wire and reprogram keyless entry receiver. See PROGRAMMING PROCEDURE  .
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