LEMON Manuals: Even more car manuals for everyone
Home >> Chevrolet >> 2012 >> Traverse LS, AWD >> Repair and Diagnosis >> Electrical >> Horns >> Horn System >> Diagnostic Information and Procedures >> DTC B2750 >> Circuit/System Testing

Circuit/System Testing

  1. Ignition OFF, disconnect the HORN relay.
  2. Ignition ON, verify a test lamp illuminates between the B+ circuit terminal 85 and ground
    • If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance. If the circuit fuse is open, test the control circuit terminal 87 for a short to ground. If all circuits test normal, test or replace the HORN relay.
  3. Connect a test lamp between the control circuit terminal 86 and the B+ circuit terminal 85.
  4. Command the horns ON and OFF with a scan tool. The test lamp should turn ON and OFF when changing between the commanded states.
    • If the test lamp is always OFF, test the control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the BCM.
    • If the test lamp is always ON, test the control circuit for a short to ground. If the circuit tests normal, replace the BCM
  5. If all circuits test normal, test or replace the HORN relay.
scientia non olet · About LEMON Manuals