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.
Theory Of Operation
When Left or Right Turn Signal Lamp illumination is requested, the Left Multi-Function Switch sends a hard-wired signal to the Body Control Module (BCM). When the BCM receives this signal, the BCM provides a Pulsed Width Modulated (PWM) voltage, through the Front and Rear Turn Lamp Driver circuits to the Front Lamp Assemblies and Rear Tail Lamp Assemblies and if equipped, through the Mirror Turn Signal Driver circuits to the Driver or Passenger Exterior Rearview Mirrors.
NO RELATED
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.