I'll bet I'm not the first, nor will I be the last to discover unknown, undocumented and seemingly pointless modifications to what was a perfectly good RV that most likely functioned as designed until someone "fixed" it. Then the next owner came along and said "WHAT THE HECK...." or words to that effect.
When I bought my '88 Dodge B-250 Roadtrek conversion it was nice and clean, showing some age but nothing scary. It started, ran and drove as expected with no problems. It was connected to shore power, and the seller cautioned me not to leave it connected thus "for too long", and away I went. Well, of course I found out how long connected to shore power was "too long" the hard way when I discovered both the vehicle and the house batteries were completely dead.
Long story short(er), I found that both batteries were being charged from the inverter as well as the vehicle alternator, with no battery isolation at all and by leaving shore power connected for "too long" the batteries were toast. I spent many years working in electrical and electronic fields, and thought I had seen about everything! Suffice it to say that I had not
In addition to various mystery connections that appear to be related to lighting, sound, and "who knows what" circuits, the criminal wire mechanic had used several yards of #12 stranded paired green and white electrical wire connected with wire nuts and split bolts, and in some cases just twisted together and taped, and the cheap electrical tape was unraveling as (practically) as I watched. Better yet, those green and white wires used one color for hot and the other for ground, but sometimes white was hot and sometimes green was (and vice-versa for ground).
Well, job #1 was to remove all the mystery stuff without inflicting further damage. I've done almost all of that, ordered a battery isolator and found an owner's manual for the '88 Roadtrek on this site (THANK YOU VERY MUCH!!!)
Unfortunately, the manual doesn't have any wire schematics and refers to the manuals for the various appliances, so there's more research to do but at least I've gotten well under way.
Shore power is currently running the inverter and the air conditioner (Summertime in Texas, y'all!!) I'm going to pull the inverter out from under the bunk to get at its rear panel and see if I can figure out what is powered from there. Refrigerator, propane system and water pump are the items I know I'll need to inspect and repair or verify proper function.
My major question for the forum is this: Does anyone know of a good general RV accessory "textbook" or installation/troubleshooting guide that's readily available. Online for download would be much preferred, so I can keep up the momentum on the project.
Thank you all for listening to my tale of woe. I would appreciate any kind words of encouragement and/or tips and sources for more reference material.
Over & out, & standing by....