Not on mine. The in/out switch just sends a signal voltage to tell the controller what to do. The 12 volts for the motors is fed to the controller via a much larger gauge wire. Any Schwintek controller Iโve had also has indicator lights that show a fault.
Hereโs the url for all the
Documentation , troubleshooting, etc.
Norman & Janet with Minnie the Weiner Dog
2005 SunnyBrook 38 BWQS 5th Wheel (stationary in FL for snowbirding)