Greetings Bob!

There wasn't a service manual until 1972 or 1973 so the only wiring schematic that I know of is the rudimentary one that is contained in the owner's manual. Your best bet may be to contact another '68 owner who may be able to take detailed photographs of the Univolt wiring -- Ed Emerick has a '68 Sovereign which would have very similar wiring and Till (Ted) has a '68 Overlander ("smushed Overlander") that is very original and would be another possible source for comparative photos.

The other option is basically using a power source or electrical testing tools to check each of the loose wires.

Kevin

Hi Kevin,
My name is Bob Hupp, I was wondering if you could point me in the right direction. I just purchased a 1968 overlander international and someone has really botched up the wiring. The uni-volt system is in place, all of the power outlets work fine, the lights on the other hand, do not work at all. there is no battery an there are so many loose wires in the boot that I do not know which ones belong to the battery. would you happen to know of a wiring schematic for the overlander.
Thanks, Bob