The odometer in a RAM ProMaster is flashing because it needs to be reset. This can happen due to a number of reasons:
• Blown fuse - The vehicle may have blown the fuse responsible for powering the odometer.
• Loose connection - There may be an issue with the wiring leading to or from the odometer display.
• Dead battery - If your vehicle’s battery has died, this could cause your odometer to flash when power is restored.
In any case, it's important to get your RAM ProMaster serviced so that you can resolve any potential issues and ensure proper operation of your vehicle's components.