Hi reicher31 and welcome to the forum. Not sure if they still have tech manuals on an 81 coach, but you might try contacting Fleetwood at 1-800-854-1344 and see if they can help.
If you can provide some details on your electrical problems, there's a wealth of knowledge with other forum members who may be able to help.
Good luck and safe travels..
Jim & SherrySeward
2000 Residency 3790 v10 w/tags 5 Star tune & Banks system Suzuki XL7 toad