Does a car need to be running for a backup camera to work?

Hi, this is Bo, an auto expert on RepairPal's Car Genius team! For most vehicles, including your 2003 Dodge Ram 1500, the backup camera typically works as soon as you shift the vehicle into reverse, regardless of whether the engine is running. However, if your vehicle’s electrical system is set up to power certain accessories (like the camera) only when the engine is on or the ignition is in the "on" position, then the engine may need to be running or at least in the "accessory" position for the camera to function. If the camera isn't working even when the truck is in reverse, it could indicate an issue with the wiring, fuse, or the camera itself. A quick inspection should help narrow that down. If you need any further advice or want help finding a trusted RepairPal shop in your area, please feel free to call us at 877-913-1554.