I know this thread is a little bit old but I'll try anyway.
I think I'm going to do this to my '71 Sovereign
. I bought the Boondocker and the Parallax FB9 fuse box but I'm having a difficult time hooking up the blue wire. Somewhere on here it said to hook it up to the negative, then I saw hook it up to the positive. It's probably something simple but I would like the ammeter to work and it won't with the Parallax.
When I took the fuse panel off my Univolt IV, the grey wire fuse connector had a wire out of the backside that went deep into the Univolt somewhere. It looks like the Univolt changed in 1972 because mine is a little bit different.
So the question is:
Airline- Where did you attach the other end of the grey wire connection to? If I wired it like yours, I would have a 6" piece of wire out the back of the fuse panel?