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Old 09-08-2011, 02:22 AM   #15
In the Forgotten far North.
BLE 'BURBAN's Avatar
Join Date: Jul 2007
Location: Anchorage, Alaska
Posts: 2,627
Re: Hooking up two batteries together on my 73 c10?????

I've always ran 2 batteries by hooking them up + to + and - to - . Now what MOST PEOPLE do from here is simply go directly to the starter and ground off of one battery only. Which is fine if you want to double your reserve capacity.
But if you want to DOUBLE your COLD CRANKING AMPS... Hook the 2 batteries up the same way as described above BUT go to the starter (+) off of one battery and ground (-) off of the other battery.
1987 R3500 CREW CAB DUALLY (BIG RED)Acquired 06/12/2015
1990 chevy suburban V2500 5.7L
My cluster Mods-Nov 2007
overhead console Stereo install Round 2 Aug 2009
Heated/turn signal mirror upgrade
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