Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Horn Relay
1998 GMC Envoy 2WD V6-4.3L VIN WSECTION Horn Relay
Outputs:
Range: ON/ OFF
The horn relay output refers to the commanded state of the horn relay coil. The horn button and the RFA transmitter panic button are inputs to the BCM. The BCM supplies a ground to the horn relay coil and sounds the horns.
ON displays when the BCM commands the horn relay coil to turn ON under the following conditions:
1. You press the horn button.
2. You press the transmitter panic button.
OFF displays when the BCM does not command the horn relay coil to turn ON and neither the RFA transmitter panic button nor the horn button are pressed.
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.