To troubleshoot your battery disconnect switch issue:
1. Check for a blown fuse: Inspect the fuse protecting the switch and replace it if necessary.
2. Inspect the switch: It may be faulty or worn out, preventing it from staying engaged.
3. Check for loose or corroded connections: Examine all wiring and connections for damage or corrosion.
4. Test the voltage: Use a multimeter to check for voltage drops when the switch is engaged.
5. Look for a failing solenoid/relay: If your system uses one, it may not be holding the connection properly.
6. Manually engage the switch: If it works when held, but not on its own, the switch may need replacing.
If none of these steps resolve the issue, consider replacing the switch or contacting a professional for further diagnosis.