Batteries

[Alupinski]

So my 05 1800sr3 has one battery but looks like it can hold 2 or should have 2. Question I have is if I put a second battery in there how do I hook both of them together?

[mmwjr]

No they should be wired to a battery selector switch which has four positions, off, batt 1, batt 2, and both. The negative of both batteries will be tied together to the engine block.

[jrsick]

You can start by looking at Blue Sea Systems battery switches. They have some videos and literature that explain what the switches do and how to hook them up.