# Power Window Switch Repair in Upland > Power window switch repair in Upland for windows that work from one switch but not another, sticky master switches and spill damage. Tested first. Source: https://route66autorepairshop.com/electrical-services/power-window-switch-repair Updated: 2026-09-17 Business: Route 66 Auto Repair, 1775 W Foothill Blvd, Upland, CA 91786, (909) 608-7699 Hours: Monday to Friday 8 AM–5 PM, Saturday 8 AM–2 PM, Sunday closed **TLDR:** If a window works from **one switch** but not the other, the motor is fine and a **switch or its wiring** is the likely cause. Power window switch repair fixes the buttons that command your windows, usually the driver's master switch that controls all four. Route 66 Auto Repair in Upland repairs switches damaged by spilled drinks, worn contacts or a stuck lockout button. Our ASE-certified technicians test the switch output before blaming the motor, and your written estimate states whether the new switch needs setup or module programming on your vehicle. ## What are the signs of a bad window switch? - A window works from the passenger switch but not the driver's master switch - Buttons feel sticky or crunchy after a spill - All rear windows stop working at once - The window lock button does nothing or will not release - Switch lights are out or the panel feels warm ## Why is the master switch the usual suspect? The driver's switch gets the most use, and it sits where drinks and rain from an open window land. Sugar and water corrode contacts inside. On many newer cars the master switch is also a small module that talks to the doors over a network, so a failed switch can affect mirrors and locks too. A quick test is simple: try each window from both its own switch and the master. If one path works, the motor is healthy. If neither works, the [power window motor](https://route66autorepairshop.com/electrical-services/power-window-motor-repair) or the door jamb wiring is more likely. Wires that flex in the jamb can break, which is a job for [wiring harness repair](https://route66autorepairshop.com/electrical-services/wiring-harness-repair). ## Our window switch repair process 1. **Run both paths:** Each window is tested from its own switch and from the master switch. 2. **Check the lockout:** We confirm the lock button is not the cause, which saves a part. 3. **Test switch output:** A meter or scan tool shows whether the switch sends the command in both directions. 4. **Replace and set up:** The switch is replaced, and any setup the estimate lists is completed. ## What's included in power window switch repair - Window test from every switch - Lockout button check - Switch output or network command check - Switch replacement and trim reinstall - Check of mirrors and locks on shared switch panels ## How urgent is a switch fault? **Need now:** - No way to close the driver window - A stuck switch running the motor against its stop - A warm switch after a spill **Need later:** - One rear switch that fails while the master still works - A dim switch light - A sticky button that still responds ## How pricing and timing work A simple rear switch is a small job; a master switch with a built-in module costs more and may need setup. We test first and quote in writing, and the diagnostic fee is stated at the counter before testing and applies to approved related repair. AAA members save 10% on parts and labor, up to $75, with the card. Switches in stock are usually installed the same day when the board allows. ## Aftercare Keep drinks away from the door panel and close windows before washing the car. If a window stops again, call [(909) 608-7699](tel:+19096087699). For whole-window trouble beyond electrical parts, see [power window repair](https://route66autorepairshop.com/auto-body-and-glass-services/power-window-repair). ## Frequently asked questions ### Can a spilled drink really ruin a window switch? Yes. Sugary drinks leave residue that corrodes contacts and makes buttons stick. Sometimes cleaning helps, but corrosion inside usually means a new switch. ### Why do all my rear windows not work? Check the window lock button first. If it is off and they still do not work, the master switch or a shared fuse is the likely cause. We test both. ### Is the switch part of the door module? On some cars it is. We check your vehicle at intake, and if the replacement needs programming, that need is confirmed on the estimate. --- Call (909) 608-7699 or visit https://route66autorepairshop.com/contact for a written estimate.