Quote Originally Posted by Meyeronfire View Post
Hey guys, looking into installing a second battery here pretty soon. Was looking at buying a battery switch wanting to see what you guys run. I have read a little about them and want to make sure I connect everything right, I've read that if you get the wrong type or have both batteries turned on for ex 1+2 it can cause damage to the alternator. Looking for recommendations on the better switches to buy and also install advice. Im running a 03 Launch SSV with indmar GM small block EFI. Thanks in advance, Matt.
I bought one from Supra (SC) on my 2007. It's what the factory is using the newer boats.

Not that it's the best one, but I have a buddy that was helping me install new ballasts last spring. He has a connection and that is what we put in after the ballast project was complete.

On the Supra Site, there is a dowloads page.
http://www.supraboats.com/downloads/...wners_2013.pdf
Page 59 of 92 is how it was wired.

Mark