that is one nice van !!!
if it were mine, i buy small spool of 4 wire trailer wire 25 ft for like $20.00 at your parts stores.you can split it in two wire sections and i would re-wire all the running lights.i would also ground each light individually...
Just me though...
I would suspect the problem to be more at the license plate light area or if someone added trailer connector..that's were i start.
Martin
