LEMON Manuals: Even more car manuals for everyone
Home >> GMC >> 2018 >> Acadia Denali, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 257 (Horn System) >> Diagnostic Information and Procedures >> Horns Malfunction >> Component Testing

Component Testing

WARNING: This page is about a different car, the 2017 Cadillac ATS. However, it is still accessible from the selected car via links, so may be relevant.

P13 Horn Assembly

  1. Ignition/Vehicle » Off
  2. Disconnect the electrical connector:P13 Horn Assembly
  3. Connect a jumper wire between the test points:Ground terminal 1 &Ground
  4. Momentarily connect a 15 A fused jumper wire between the test points:Control terminal 2 & 12V

    Verify the component turns On and Off when connecting and disconnecting the jumper wire:P13 Horn Assembly

    • If the component does not turn On and Off 

      Replace the component:P13 Horn Assembly

    • If the component turns On and Off 
  5. All OK.

S33 Horn Switch

  1. Ignition/Vehicle » Off
  2. Disconnect the electrical connector: X1&X2@S33 Horn Switch
  3. Test for infinite resistance between the test points:Signal terminal 1 X1&Ground terminal 1 X2- SwitchNot Pressed
    • If less than infinite resistance 

      Replace the component:S33 Horn Switch

    • If infinite resistance 
  4. Test for less than 3 Ω between the test points:Signal terminal 1 X1&Ground terminal 1 X2- Switch»Pressed
    • If 3 Ω or greater 

      Replace the component:S33 Horn Switch

    • If less than 3 Ω 
  5. All OK.