Discovery Main Disconnect Issue

[Z Squared]

A couple weeks ago I disconnected the main battery cable to fix another issue and ever since the main disconnect has been acting up. It will stay on for about 5 minutes after engine starting or on shore power. It was working under generator power for a while but doesn't seem to now. When I use the disconnect switch by the front door I can hear it the thud of something switching but can't find it. I'm thinking the solenoid is bad but I can't find it. Any ideas? 2011 Discovery 40G.

[BFlinn181]

If you have someone else activate the solenoid, your ears should lead you to its location. I knew where mine were, but I had to have someone activate the chassis solenoid to determine which was chassis and which was house. They are now plainly marked.

[Z Squared]

So I tracked it down to the Battery Control Center. Made by RV Custom Products model F73-1044. Looks like I can by individual components, some quite expensive, from an independent website. I haven't opened it up yet but from the pictures online looks like a pretty complicated circuit board. Anybody messed with the components?