Wiring for dual batteries...help - The 1947 - Present Chevrolet & GMC Truck Message Board Network

jott_06 · 10-10-2008, 07:21 AM

Ok this is actually for my daily driver sonoma but you guys talk more than the s-10 guys... i bought two new batteries and some battery cable and i plan to run dual batteries in the bed because the guy i got the truck from said the compressor for my bags draws to many amps and he's ruined a few batteries. Do i just connect the two batteries with the cable i bought by going positive to positive and negative to negative? That should keep it 12 volts correct? My regular battery is already mounted in the bed so i am just goint to replace it with the two i bought.

MrBeast · 10-10-2008, 07:54 AM

Yes, you go posative to posaitive and negative to negative, that is called hooking them up in paralell, if you hooked them up in series which would be a ground to a negative, then hook that batteries posative to the negative on the other batt, then ran that batt's posative to your truck, that would give you 24V.

Also somthing you may want to consider is getting a Warn Battery Isolator, it will make sure you always have the juice to start your truck!

Bus Ted Knuckle · 10-10-2008, 08:35 AM

Yes

454_72_4X4 · 10-11-2008, 09:53 PM

Yep. Positive to positive and negative to ground.
I just did this to my 93 a couple weeks ago.

68C15 · 10-11-2008, 10:48 PM

I feel sorry for your alternator. its gonna need to charge 2 batteries thruogh about 30' of cable.

10-10-2008, 07:21 AM	#1
jott_06 Camaro Club Join Date: Jun 2007 Location: ohio Posts: 472	Wiring for dual batteries...help Ok this is actually for my daily driver sonoma but you guys talk more than the s-10 guys... i bought two new batteries and some battery cable and i plan to run dual batteries in the bed because the guy i got the truck from said the compressor for my bags draws to many amps and he's ruined a few batteries. Do i just connect the two batteries with the cable i bought by going positive to positive and negative to negative? That should keep it 12 volts correct? My regular battery is already mounted in the bed so i am just goint to replace it with the two i bought.

10-10-2008, 07:54 AM	#2
MrBeast high-Tech Red Neck Join Date: Feb 2008 Location: Livingston, MT/On my boat WA/BC/AK Posts: 2,294	Re: Wiring for dual batteries...help Yes, you go posative to posaitive and negative to negative, that is called hooking them up in paralell, if you hooked them up in series which would be a ground to a negative, then hook that batteries posative to the negative on the other batt, then ran that batt's posative to your truck, that would give you 24V. Also somthing you may want to consider is getting a Warn Battery Isolator, it will make sure you always have the juice to start your truck! __________________ "He used to be a pretty nice feller, now he's a welder!"

10-10-2008, 08:35 AM	#3
Bus Ted Knuckle Son of a gun Join Date: Jan 2007 Location: Hot Springs, Arkansas Posts: 1,636	Re: Wiring for dual batteries...help Yes __________________ Bill BEATERS ARE NEATER

10-11-2008, 09:53 PM	#4
454_72_4X4 Registered User Join Date: Apr 2004 Location: N.E. MO Posts: 1,749	Re: Wiring for dual batteries...help Yep. Positive to positive and negative to ground. I just did this to my 93 a couple weeks ago. __________________ 72 C20 4X4 454 4 speed 89 Trans Am (was) 305 TPI 700r4 93 C1500 2wd Extended cab 350 700r4 98 Sonoma (TPI outa the Trans Am) 03 Yamaha 660 Raptor 03/04 660 Raptor 07 700 Raptor 85 Honda Odyssey

10-11-2008, 10:48 PM	#5
68C15 blood type; Retumbo Join Date: Jan 2004 Location: next to my reloading bench Posts: 10,269	Re: Wiring for dual batteries...help I feel sorry for your alternator. its gonna need to charge 2 batteries thruogh about 30' of cable.



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