I FOUND IT!!!!!!!!!!........ Started the motorhome tonight and checked the charge at both the coach & chassis batteries. Chassis charge was 14.2v and coach batteries were not charging at all and were at 12.4v. So I back traced the positive side of the coach battery an traced into the fuse/solenoid box. Found that across one of the solenoids, I had 14.2v on one side of the solenoid, and 12.4v on the other side. So I grabbed a 1/2" wrench and the nut was very loose & tightened it up and checked the all the other solenoid connections & they were all loose to one extent or another. Shut down the engine & coach voltage stayed at 13.6........my Lp gas detector was working correctly, & voltage only dropped 1/10v after having most of the interior lights on for 15 minutes, and as soon as I turned the lights off..... Voltage went right back to 13.6v.......... Thanks guys for the feedback and ideas!!!!!!! I greatly appreciate it.
1996 Bounder M32h, Ford f53 chassis, 7.5l(460)
Onan Micro-Lite 4000