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.
Description & Operation
Individual motors operate each door lock. The direction the motor turns depends on the polarity of the supply voltage. The door lock switches control the supply voltage polarity. Each switch will lock all the doors.
Each motor has a self-resetting circuit breaker built in. Voltage is present at the door lock switches at all times. Voltage is also present on the open contacts of the door lock relay at all times.
When a door switch is moved to "Lock", current flows through the switch and lock relay coil to ground. The relay closes, causing current to flow through the lock relay contacts, door lock motor, the unlock relay contacts, and then to ground.
When a door lock switch is moved to "Unlock", current flows through the switch, the unlock relay contacts, the door lock motor, the lock relay contacts, and to ground. This causes the lock motor to unlock the door.
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.