Hi i have just started having the same problem.
95 super custom 3l, my problem is
1 speedo stopped working,
2 when i press over drive the light blinks continuously [ over drive seems to be working fine though]
I would love any help with this, if you live in sydney i'll buy ya a beer for advice.
It has been very wet perhaps the damp is effecting this somehow?
the van is drivin fine.
cheers
linf