Battery help

[carsonb]

I need help! I have a 2014 PPV with dual batteries. It needs a new battery. Do I NEED to replace both at the same time, or can I wait a week to replace the second one? I assume that I for sure need to replace the passenger side, as it is the primary.

I’m sorry for not searching first, but I am using my phone, which is a pain to search with, and am a little anxious to get an answer.

Also, both batteries were massively corroded. What could be causing this? It’s my wife’s daily, so maintenance is a rare treat for it.

Thank you all for the help.
Carson

 

[Doubeleive]

you can replace one at a time but I would do it as quickly as possible so the new one does not suffer any damage, just replace the one that has the lowest voltage first

 

[1BADI5]

Yeah one battery at a time is fine.

Are you talking about corrosion on the battery post, terminals or both?

 

[OR VietVet]

Is it just because of the cost for two batteries that you don't replace both at the same time? You better watch your back when you can't see your wife if you replace just one at a time.

 

[carsonb]

Thanks for the help guys. I went ahead and did both at the same time. It hurts the wallet, but it’s better than being stuck somewhere.
The corrosion was in both terminals of both batteries. Could it just have been that the batteries weren’t fully charging?

 

[OR VietVet]

Corrosion is a hell of a resistance source and will keep batteries from charging fully. If there was that much corrosion it could also be inside the insulation of the battery cable near the ends and if is bad enough you will see the insulation swell out larger than the normal size of the cable. Unseen corrosion is as bad as seen corrosion. Hopefully you check both ends of all cables for tension and being clean. Check connections at the alternator too.

If you do all that then the wife owes you your favorite meal.

 

[2011SSVHOE]

Not using it for police work, or towing a camper you could have most likely replaced just one and left the other disconnected. I had a crewcab dually that I did that to, with no problems.

 

[Kee Fuller]

any particular reason you running 2 batteries?

 

[PPV12HOE]

any particular reason you running 2 batteries?

Mine came from GM with dual batteries...

 

[Kee Fuller]

Mine came from GM with dual batteries...

I mean, you got a ppv. Unless you still got alot of police equipment on there, dual battery isnt really needed.

 

[PPV12HOE]

I mean, you got a ppv. Unless you still got alot of police equipment on there, dual battery isnt really needed.

No it's not necessary, but I'm also not gonna delete it either... eventually it will be useful for audio and some headrest TVs for the kiddos...

 

[Kee Fuller]

No it's not necessary, but I'm also not gonna delete it either... eventually it will be useful for audio and some headrest TVs for the kiddos...

More power to ya..

 

[bobo49505]

It's shure nice in the winter dont half to worry about a dead battery or slow starting with 2 batteries

 

[OR VietVet]

If I could easily add a second battery to my rig, I would. Especially with the addition of audio and video aftermarket doo dads.

 

[Doubeleive]

If I could easily add a second battery to my rig, I would. Especially with the addition of audio and video aftermarket doo dads.

You can all you need is a battery tray, battery holder, and a couple cables for a parallel install.

 

[OR VietVet]

Thanks. I know the parts needed because I have done the add the battery thing before on another rig plus my old 73 Blazer that I built as a rock crawl 4x4 with one ton axles and all kinds of goodies, had a double battery set up. I was just wondering about the room. Anyone have pics for this on a NBS rig. Mine is a 2002.


Just went and popped the hood to look. I am assuming the go to spot is passenger side at the firewall? It's either that or a relocation of the air filter box. I guess the extra battery tray is a direct bolt in at the passenger firewall?

If I recall, from before, all I did was bolt in the tray and the new battery with the holder and had positive cable that ran from main battery to the positive on the new batttery and ran my ground to a spot on the block.

 

[mikeyss]

Here's pics of my dual battery setup on my 06. The setup is very similar on my 09 Tahoe. Shockingly I don't have any pictures of my L9H.

 

[OR VietVet]

Why is there two cables off of the positive? I thought all I would need is a long enough cable with two female connections from my main battery positive to the 2nd battery positive and a ground off of the 2nd battery to the block.

 

[mikeyss]

Why is there two cables off of the positive? I thought all I would need is a long enough cable with two female connections from my main battery positive to the 2nd battery positive and a ground off of the 2nd battery to the block.

I have one to the positive and the other one is going to the alternator. The 06 has RVC and I did it this way to make sure that other battery gets charged.

 

[OR VietVet]

That one doesn't come with a CANdi module... if you look I think I saw one the other day for $380ish that came complete with a CANdi module...

I have one to the positive and the other one is going to the alternator. The 06 has RVC and I did it this way to make sure that other battery gets charged.

What gauge wire is that to the alternator?