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.
Component Testing
M74P Window Motor - Passenger/M74LR Window Motor - Left Rear/M74RR Window Motor - Right Rear
- Ignition/Vehicle - Off
- Disconnect the appropriate electrical connector:
- M74P Window Motor - Passenger
- M74LR Window Motor - Left Rear
- M74RR Window Motor - Right Rear
- Connect a 25 A fused jumper wire between the test points: Control terminal 1 & B+
- Momentarily connect a jumper wire between the test points: Control terminal 2 & Ground
Reverse the jumper wires 2 times between the terminals.
Verify the component works as specified: M74 Window Motor = Up & Down
- If not the specified state
Replace the component:
- M74P Window Motor - Passenger
- M74LR Window Motor - Left Rear
- M74RR Window Motor - Right Rear
- Go to next step: If the specified state
- If not the specified state
- All OK.
Complete the testing as quickly as possible in order to prevent overheating and damaging the component.
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.