NOTE: Reviewing system description and operation information will help determine if condition described by customer is normal operation, and may help determine correct symptom diagnostic procedure when a malfunction exists.

If power window system description and operation has been reviewed, go to next step. If description and operation has not been reviewed, see POWER WINDOW SYSTEM under DESCRIPTION & OPERATION.
Operate power windows express down function. If express down function does not operate properly, go to next step. If express down function operates properly, go to DIAGNOSING INTERMITTENTS .

NOTE: Driver door window switch may be referred to as left front window switch, master window switch or master switch.

Check for poor connections at master switch connectors. If poor connections are not found, go to next step. If poor connections are found, repair as necessary. After repair, go to step 5 .
Replace master switch. See WINDOW SWITCH under REMOVAL & INSTALLATION. After repair, go to next step.
Operate system to verify repairs. If system does not operate properly, go to step 2 . If system operates properly, system is okay.

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.

Safety Warning

Test C: Express Down Function Inoperative

Use the Manual With the Right Hardware

When to See a Mechanic