Interesting, I am doing the same thing. Here's what I think I am going to do step-by-step. If anyone thinks I am about to do something stupid or wrong, please advise. Also, I welcome any comments.
First, I have a 89' Excella, with the standard auto-reset 12 v fuses in the panel. (buss bar running down the inside of all fuses, and circuit wires on the other side.)
Before you begin, disconnect all shore power, and turn the 12v
kill switch to OFF.
Remove old univolt:
1. Unplug or disconnect the 120v cord. (mine unplugs)
2. Remove the NEG wire from the fuse panel (lower left hand corner in the fuse panel)
3. Remove the POS wire from the 12v
Kill Switch (or the buss bar in the fuse panel)
4. Remove the 12v
indicator wire from the single non-bussed fuse in the fuse panel (not connect to buss bar)
WA-LA, old unit removed!
Install the new Inetli-Power (IP for short):
(NOTE: Since I am going from a 50A univolt to a 60A IP, I am going to use #6 AWG wire. I will use a white wire for the ground, and a black wire for the POS)
1. Connect the White wire to one of the -NEG terminals on the IP. (it takes an allen wrench from the top on the terminals to do this). Run the white wire up to the fuse panel and connect it to the ground terminal in the fuse panel.
2. Connect the Black wire to one of the +POS terminals on the IP. Run that wire to the 12v Kill Switch, OR directly to the Buss Bar in the fuse panel. (Better to have a kill switch) If you run it to a kill switch, there will be 3 wires on this side of the switch, 2 from each of the two batteries (POS + side), and the wire from the IP. The single wire side of the 12V Kill Switch then goes to the Buss Bar in the fuse panel.
This essentially completes the replacement of the univolt to the Inteli-Power. However, there are two more steps that need to occur.
1. Ground the IP. On the opposite side of the IP from the POS/NEG connectors, is a single ground connection. Connect a wire from there to a chassis ground somewhere (anywhere close).
2. Then, in the removal step you removed a 12v Indicator wire (step 4). You will need to repace this by using a normal 12v transformer (one like the ones that come with your cell phones. Or go to Radio Shack and get one.) The two wires coming out of the transformer are + and - (usually indicated on the transformer). Connect the + to the single isolated fuse in the fuse panel, and the - to the ground block you connected the IP to. Plug it into a normal wall jack (120vac) and you're back in business.
Anyway, this is what I intend to do. Does anyone seen anything that might cause me grief? Also, use these instructions at your own risk. This is a best-guess on my part.
OH, and to isolate your short, you can remove the circuit side of each circuit in the fuse panel to determine which circuit it is (don't use the shock method, use an OHM meter to see if the current is still there). And like before, it's probably a fixture or in case of remodle work, a pinched wire or something. But you need to find it and fix it, it can cause you real grief. You get shocked when you have your shoes off because YOU are providing the circuit from + to -. When you have shoes on, you're insulated.
Anyway, let me know if this makes sense or not. It's what I am going to try.