Do I need a battery isolator?

[Zeus33rd]

My K20 was a factory 6.2 till I swapped it out for the 454. The 6.2 had dual batteries. They were directly conected to each other. When I did the 454, I just put one battery back in there on the passenger side. When the truck was a diesel, with a battery on the drivers side too, I had my amp for my sub wired to that battery. Now, with the battery on the passenger side, the power cable for the amp won't reach and I have no boom boom. lol

Anyways, my question is....(excuse my electrical ignorance) I want to install the other battery so I can rewire my amp...Can I wire the two batteries together like they were with the 6.2? Or do I need to get an isolator thingy? Both batteries are identicle, quality batteries and almost new. Alternator is a 140amp power master. This is my dd...no winch or lights or any other high draw stuff....The Sony 600 watt mono sub amp is about the only extra electrical thing I have.

 

[4X4HIGH]

You can wire it like before but both batteries will drain if you have a problem. The reason for an isolator is to "isolate" each battery when the ignition is off.

 

[Zeus33rd]

Cool.....Thx Scott.

 

[hunterguy86]

I would run one. Im guessing that when you are going to run your audio system off the spare battery and run the rest of ur truck off the main. An isoloater would be good because when you shut the truck down you can leave the radio on without worrying if your truck will start or not.