I'm in the process of fabricating front and rear bumpers, been doing some welding on the frame but allways with the ground disconnected.
<img src="/forums/images/graemlins/confused.gif" alt="" />
I had a flasher go out in an econoline van one time and it messed up the whole electrical system. Think I'll start there.
Also thinking it could be a connection common to the three. I'll have a look @ the schematic.

'89 Monty LWB: Auto, 3" Budget Lift, 2" Body Lift, 33x11.50 Toyo MT, KYB's, LSD, Superwinch Hubs, Warn X8000i, Rock Sliders, Bumpers & STUFF Fab'd by me
'89 Raider SWB: LSD, 31" Toyo AT's, KYB's
'97 Trooper LS