Dual Batteries

[00cls1camaross]

I think my truck came factory with two batteries. 1 has large gauge wires attached to it and I figured that must be the main battery to start the truck. The other one has some extremely small gauge wire attached to it and it runs to the back of the driver's side hood. The wiring appears to be factory, but I don't understand its purpose.

Thank you!

 

[00cls1camaross]

Bump.

Can anyone tell me how it is wired and why it is in here. I looked up my RPO codes and it came with this battery as an option.

 

[thz71]

Pics help. Is your truck a diesel?

 

[great white]

Um, a year is at least needed before anyone can tell you anything.

The engine would also be helpful as diesels are different, as well as ambulance packages. These two variants came OEM with two batteries.

You can go to the wiring section of the forum and look up the charging diagram, which should tell you what you need to know.

 

[Hezsus]

Diesels came with dual batteries, wired in parallel with heavy guage wire for starting, many gassers have the tray for a second battery which makes it a very easy and popular upgrade. If there is just small wire running to/from it it may be just used for accessories.

 

[kkirwan71]

What would be the purpose of dual batteries in a gas truck?


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[98_k1500]

Winch... any other short term use, heavy draw type of accessory.

 

[RynoHarris]

What would be the purpose of dual batteries in a gas truck?


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Aftermarket stereo

Sent from my HTC One using Tapatalk

 

[great white]

Extreme cold weather for the cranking amps, high compression engine, etc...

 

[kkirwan71]

Definitley going to look into that now thanks guys


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