From day one it has bothered me that I cannot use the acc switches on my 2100SC. Over the Laborday weekend I decided to dig into the wiring a little further. What I found is that the Owner supplement that shows the wiring diagram for a 2100SC is not even close. The diagram shows 14 fuses in a 7x7 block, but when I looked up under the dashboard the block in my boat (purchased in 2004) has only 10 fuses in a 5x5 arrangement. I further found that a red lead labeled "Acc" was not hooked to anything. I am guessing at this point that this lead provides juice to yellow leads on the back side of the accessory switches. Two questions, does anyone have a manual that shows what the wiring diagram for a 2100SC should be and does that manual show a 10 fuse configueration? My next step is to go beat up on Maxum and see what they say, but they have been slow to respond in the past.