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.
Circuit/System Description
The liftgate window unlatch switch is an input to the body control module (BCM). The BCM supplies a 12 V signal to the liftgate window unlatch switch and when the switch is pressed, signal circuit voltage goes low. When the BCM receives a liftglass release signal, the BCM will supply voltage and ground to the liftgate window unlatch relay coil, energizing the relay. When the relay is energized, battery voltage flows through the closed contacts of the relay to the liftgate window latch assembly which activates allowing for the liftgate window to be raised to the open position.
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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.