CAR DOCTOR Q&A: Resetting the Window Regulator in a Toyota 4Runner

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Are the power windows acting up in your Toyota after a dead battery? AAA’s John Paul has a quick and easy solution.

Q. I replaced the battery on my Toyota 4Runner and all was good or so I thought.

The truck starts and runs great but the power windows are not acting correctly. When I push window button down the window goes down but when I push up the window goes up about and then drops back down. It doesn’t go down all the way but part way, but it doesn’t close either. What happened, the old battery was so dead the lights wouldn’t come on

Did the low voltage damage the window motor or the truck’s computer?

2010 4Runner

A. The problem is the power window regulator needs to be reset. This usually happens after a window motor is replaced but perhaps the battery voltage was so low the system needs to be reset.

If the auto up and down function as well as the “finger pinch” function are not working, a reset usually solves the problem.

Fully open the window and continuing pressing the button for at least two seconds after the window is fully open. Then fully close the window and hold the switch for at least two seconds once the window is closed.

The light on the switch should be on steady if it is off or flashing try the reset procedure again.

John Paul is public affairs manager for AAA Southern New England. A certified mechanic, Paul tests dozens of new cars each year and also hosts a radio show on AM 950 and 550.