dual batteries?

[lo-lyf]

Wire the batteries in parallel. + to +, - to - to ground.

That's an easy way, or if you want to keep one isolated as a backup you can wire in an isolator relay. Say you spend a lot of time running your radio and want to be sure you can start your truck afterwards. Wire the relay to be controlled by the main ignition(pink wire, green plug at bcm, stays on during crank). Either way works, just depends on your needs.

[pl4yboy]

That's an easy way, or if you want to keep one isolated as a backup you can wire in an isolator relay. Say you spend a lot of time running your radio and want to be sure you can start your truck afterwards. Wire the relay to be controlled by the main ignition(pink wire, green plug at bcm, stays on during crank). Either way works, just depends on your needs.

Yep, depends what you need. I was just stating the simplest way, but you know that =)

[lo-lyf]

Simplest is best sometimes. Parallel is probably what most people need anyway. It's usually lake goers and tailgate partiers that need the isolated battery.

[pl4yboy]

Simplest is best sometimes. Parallel is probably what most people need anyway. It's usually lake goers and tailgate partiers that need the isolated battery.

I ran my yellowtop and Batcap in parallel with a 250amp alternator... no problems, even pushing 3200 watts for two hours.

[hillbilly6.0]

i was thinking isolated only because my truck is the rolling dj 5 or 6 hours with the radio on MAX at the barnfires and its a pain to start it every hour to keep batterie charged. saw a write up about wrangler dual batt set up at petersons 4wheel.com any one heard of the product the after pics of the install look factory thats the look im going 4?