Slight issue with running at 16v

[CJ18]

My back batteries are grounded to the frame in the back. It was explained to me by Matt at Mechman that to make separate charging systems work properly that there could be no common wires between my front and back batteries. Now I did not ask specifically about grounds I just assumed that the only wires running to my back batteries should be 1+ and 1- from the alternator.

[PUNKYOU007]

You shouldn't have to worry about grounds....ground is ground, 14v or 18v dont matter. Nobody even makes a dual alt setup for your truck do they? That sucks, i see a lot of guys wanting one. I dont think there is much you can do about the cold morning start ups, even a stock alt charges a little higher on a cold morning. Good luck with this bro.

[Nathan @ XSpower]

If it were me and it didn't like the voltage over 16.6 I would probably just drop the voltage down in the mornings, because the alt is always going to charge higher on initial start up until it warms up. You could always add in the step downs if you wanted to drop the voltage down for your vehicle. With the step down you could run one of them and just have it hooked up to the fuse panel on the truck. It really depends on what you prefer.

[shazaam]

My back batteries are grounded to the frame in the back. It was explained to me by Matt at Mechman that to make separate charging systems work properly that there could be no common wires between my front and back batteries. Now I did not ask specifically about grounds I just assumed that the only wires running to my back batteries should be 1+ and 1- from the alternator.

I see that's what I was wondering about thanks.

You shouldn't have to worry about grounds....ground is ground, 14v or 18v dont matter. Nobody even makes a dual alt setup for your truck do they? That sucks, i see a lot of guys wanting one. I dont think there is much you can do about the cold morning start ups, even a stock alt charges a little higher on a cold morning. Good luck with this bro.

Hmm ok cool. As you can tell I'm still learning haha. I will do something all out one day. But no not really. The only one I know of is one for various 5-6 cylinder gm's and it's kind of universal, and that's the one Boilermaker used for his Trailblazer and even then he had to do some cutting and what not to make it fit. I'm willing to try it but I don't have the money right now. I don't think there really is. It's not a huge deal to turn the voltage down though. I just wanted to see what they would say about it. But thanks man.

If it were me and it didn't like the voltage over 16.6 I would probably just drop the voltage down in the mornings, because the alt is always going to charge higher on initial start up until it warms up. You could always add in the step downs if you wanted to drop the voltage down for your vehicle. With the step down you could run one of them and just have it hooked up to the fuse panel on the truck. It really depends on what you prefer.

Yeah that's exactly what I do every morning. It's not really a huge deal. The only issue I really did notice though is that my a/c doesn't really work when I'm in the 16 volts. I've noticed that today when I turned it on. It wasn't cold until I brought it down to 15.6 volts. I'm def not complaining though I love running at 16 volts.

[CJ18]

I would look into adding a step down module to the some of the cars electronics.