Component Testing
WARNING: This page is about a different car, the 2016 Cadillac ATS. However, it is still accessible from the selected car via links, so may be relevant.
Horn Test
- Ignition OFF, disconnect the harness connector at the P13 Horn Assembly.
- Install a 15 A fused jumper wire between the control terminal 2 and 12 V. Install a jumper wire between the ground terminal 1 and ground.
- Verify the P12 horn turns ON and OFF
- If the P13 Horn Assembly does not turn ON and OFF
Replace the P13 Horn Assembly.
- If the P13 Horn Assembly turns ON and OFF
- If the P13 Horn Assembly does not turn ON and OFF
- All OK
Horn Switch
- Ignition OFF, disconnect the X1 and X2 harness connectors at the S33 Horn Switch.
- Test for infinite resistance between the signal terminal 1 X1 and the ground terminal 1 X2 with the switch in the open position.
- If less than infinite resistance
Replace the S33 Horn Switch.
- If infinite resistance
- If less than infinite resistance
- Test for less than 3 Ω between the signal terminal 1 X1 and the ground terminal 1 X2 with the switch in the closed position.
- If 3 Ω or greater
Replace the S33 Horn Switch.
- If less than 3 Ω
- If 3 Ω or greater
- All OK