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Q: Reverse lamps stay on at all times even when truck is off and key is removed from ignition.

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Reverse lamps stay on at all times even when truck is off and key is removed from ignition.
My car has an automatic transmission.

A possibility is an internally shorted digital transmission range sensor/switch. You may see a short from pin #9 to pin #11 on the switch. The test protocol is set forth in this document, however, if your plug has a different pin out configuration use the diagram in your current Factory Service Manual. If you want these steps performed by a certified Mechanic, dispatched by YourMechanic right to your location, please request a reverse light inspection/diagnostic and the responding certified mechanic will get this resolved for you. If you have further questions or concerns, do not hesitate to re-contact YourMechanic as we are always here to help you.

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