15 year old CELEBRITY PRIDE 4 WHEEL REBUILD – has old style phono plug key and is working. Trying to find electrical schematic service manual in PDF or printed. Has 2 new GELCELL batteries – charging system is working and batteries are at full charge. Phono plug turns it on and full charge is indicated in power level meter. No beeping heard, I think that the beeper is no good. Motor brushes are good. 14 character # Serial sticker is gone. White Sticker on frame is: “CELIBERTY MADE IN USA C-67248”. Need help in finding service manual. Beautiful Machine!