Q: Drivers side window very unresponsive when engine is running. Works fine in accessory mode. Any ideas please?

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Drivers side window very unresponsive when engine is running. Need to hold button for several seconds and then it usually works. Other windows work fine. The drivers side window also works fine when in accessory mode, without the engine running. Any ideas please?

My car has 42000 miles.
My car has an automatic transmission.

Hello, thank you for writing in. There are a few considerations we need to make during this process. One being the battery is responsible for providing power in the accessory mode, while the alternator provides the power while the vehicle is on. Secondly, when only one window is effected, it is typically the regulator or the motor that is to blame, rather than a switch issue. However we can test for the available power to the switch in both situations, to find out if there is an honest power drop while the vehicle is running, or if the issue is with how the motor is using the power. If the power supply to the motor is low when the vehicle is running, you will have to trace down what is causing low power. You will want to focus on the alternator, and trace the circuit to the switch checking after each component. For more help, contact our service department to schedule an appointment.

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