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Home >> Chevrolet >> 2001 >> Venture Base, Van Passenger >> Repair and Diagnosis >> Steering >> Steering Column >> Steering Column & Steering Column Switches >> Diagnostic Tests >> DTC B2752: Horn Relay Coil Circuit Low >> Diagnostic Procedure

Diagnostic Procedure

  1. If horns diagnostic system check was performed, go to next step. If horns diagnostic system check was not performed, perform HORNS DIAGNOSTIC SYSTEM CHECK  under SELF-DIAGNOSTIC SYSTEM.
  2. Connect scan tool to Data Link Connector (DLC). DLC is located below left side of instrument panel, to right of steering column. Turn ignition switch to RUN position. Using scan tool, command horn relay on and off. If horn relay turns on and off with each command, go to DIAGNOSTIC AIDS . If horn relay does not turn on and off with each command, go to next step.
  3. Turn ignition switch to OFF position. Remove horn relay. Turn ignition switch to RUN position. Using test light connected to ground, test battery circuit of horn relay coil. If test light illuminates, go to next step. If test light does not illuminate, go to step  10.
  4. Connect test light between control circuit of horn relay (Black wire) and battery voltage circuit of horn relay coil. Using scan tool, command horn relay on and off. If test light does not turn on and off with each command, go to next step. If test light turns on and off with each command, go to step  8
  5. If test light remains illuminated with each command, go to step  7. If test light does not remain illuminated with each command, go to next step.
  6. Test control circuit of horn relay for an open. If problem was found, repair as necessary. After repair, go to step  13. If problem was not found, go to step  9.
  7. Test control circuit of horn relay for short to ground. If problem was found, repair as necessary. After repair, go to step  13. If problem was not found, go to step  9
  8. Inspect for poor connections at horn relay. If problem was found, repair as necessary. After repair, go to step  13. If problem was not found, go to step  11.
  9. Inspect for poor connections at harness connector of BCM. If problem was found, repair as necessary. After repair, go to step  13. If problem was not found, go to step  12.
  10. Repair battery voltage circuit of horn relay coil. After repair, go to step  13.
  11. Replace horn relay. After repair, go to step  13.
  12. Replace BCM. See appropriate BODY CONTROL MODULES article in ACCESSORIES & EQUIPMENT. After repair, go to next step.
  13. Clear BCM DTCs. Operate system in order to verify repair. If DTC does not reset, system is okay. If DTC resets, repeat test beginning at step  2.
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