1985 Custom Deluxe Wiring problem!!

I have a 1985 Custom Deluxe and it ran fine until someone messed with it one day when i wasnt home and now I have to jump it everytime to get it started, it wont stay running very well and I basically need a wiring diagram I know nothing about wiring in this truck and its been really messed up does anyone have any suggestions or know where I can find a wiring diagram??

To get a good wiring diagram you are going to need a factory service manual. You may be able to find one on E-bay