The OnStar system cannot control the horn and hazard warning lights
Read the instructions below then start the fault diagnostic procedure.
Symptom: The OnStar system cannot control the horn and hazard warning lights.
| The OnStar system cannot control the horn and hazard warning lights |
Fault symptoms
The OnStar system cannot control the horn and hazard warning lights.Conditions
No trouble codes stored in the car for the current fault symptom.Diagnostic help
Before attempting to diagnose the fault, check that the horn/hazard warning lights are themselves working correctly when activated with their respective switches. If this is not the case, refer to the diagnostic procedure for the horn/hazard warning lights.This project is supported by memberships and donations. If you use this site, please consider Joining SCNA and/or making a donation.
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