I'm installing a stereo in an RV and would like to maintain default behavior of having the stereo receive power on vehicle accessory power/ignition, but also be controlled by a switch in the RV for use when the vehicle is not in use. These are the requirements:
- When the RV switch is OFF, the stereo turns on and off with vehicle accessory power.
- When the RV switch is ON, the stereo remains powered regardless of vehicle operation.
- The source of power when the vehicle is running does not matter, but it must utilize the RV batteries when it isn't.
Would there be any problems with utilizing a ~30A 5 pin relay to achieve this? The stereo utilizes an external amp, so it will be drawing very little power.