Need diagram for running dual batteries - The 1947 - Present Chevrolet & GMC Truck Message Board Network

mkmiller1 · 09-06-2003, 10:37 PM

title says it all. Anyone have the diagram?
thanks,
Matthew

*racedvl* · 09-06-2003, 10:48 PM

Dual batterys. . .

mkmiller1 · 09-06-2003, 11:35 PM

Thanks racedvl!

Matthew

67cst · 09-07-2003, 03:02 AM

what are benifits for 2 batteries? my 71 has the setup but i took the second one out cause it was dead...should i get another one? would it help to start it up in the winter or anything like that?

GM72K10 · 09-07-2003, 08:27 AM

Big advantage if you're snowplowing! Got the dual set up in my 72 K2500 plow truck, works great!
GM

Longhorn Man · 09-08-2003, 12:19 AM

Advantages all depend on how it is hooked up.
The way shown on this scematic will let you listen to your radio all night long, or run all the stuff in the camper all night long off of battery number 2, while as soon as you hit the ignition switch, it will switch back to battery #1. Both will charge as the engine runs.
If you hook it up with a large cable going from the positive post to the starter (on both batteries) you will get some kick ass amps to crank over in the coldest days and with the highest compression with no problems.
If you hook it up to where the positive from # one goes to the starter, then the negitave goes to positive of # 2 and then the negitave goes to ground, then you'll have a 24 - 28 volt system that will fry everything in your truck (with the exception of LED lights, and maybe your starter) and is not recomended.

mkmiller1 · 09-08-2003, 09:30 AM

I'm going to be using it to help run a winch. Which setup would you recommend for getting more juice to the winch?
thanks,
Matthew

cojnit · 09-08-2003, 05:06 PM

this would probably be good also for running electric air compressors and stuff when you are showing off your air system to the neighborhood.

Longhorn Man · 09-08-2003, 11:09 PM

(too lazy to type it all out)

Quote:

If you hook it up with a large cable going from the positive post to the starter (on both batteries) you will get some kick ass amps to crank over in the coldest days and with the highest compression with no problems.

That's how I would do it for max amps on a winch.

Hooter · 09-08-2003, 11:36 PM

the way i do it is have the one battery hooked up normally, have a lead going from the positve side of that battery to one side of a heavy duty solenoid, the other side of the solenoid is hooked up to the other battery and the solenoid is only generated when the key is on the on position, then I hook all the accesories, like my stereo and camper up to the second battery. then power is only drawn from that battery when the key is off, but as soon as the key is turned on, the battery gets linked back up to the charging system again

Brian Ringer · 02-29-2004, 01:29 AM

Thanks for the info. I have a 72 K5 and I basically want a dual system for when I go camping I can power up accesories and still have a good battery to start up the Blazer.

09-06-2003, 10:48 PM	#2
racedvl Account Suspended Join Date: Jan 2000 Location: Woodstock, IL Posts: 7,020	Dual batterys. . . Attached Images

09-06-2003, 11:35 PM	#3
mkmiller1 Senior Member Join Date: Dec 2000 Location: Magnolia, Arkansas Posts: 1,091	Thanks racedvl! Matthew __________________ GOD is good...All the time! '71 swb custom10 barn find-68K original miles 72 K5 CST rust bucket, but runs and drives 84K miles

09-07-2003, 03:02 AM	#4
67cst i love summertime Join Date: Jul 2002 Location: Kelowna BC Posts: 4,302	what are benifits for 2 batteries? my 71 has the setup but i took the second one out cause it was dead...should i get another one? would it help to start it up in the winter or anything like that? __________________ 1967 shortbox stepside Chevy, 365 hp 327, th400. GLOVE BOX LIGHTS FORSALE, click link for info http://67-72chevytrucks.com/vboard/s...d.php?t=273724

09-07-2003, 08:27 AM	#5
GM72K10 Next! Join Date: Jan 2003 Location: Eastern Pa. Posts: 2,483	Big advantage if you're snowplowing! Got the dual set up in my 72 K2500 plow truck, works great! GM __________________ 86 K30 CUCV M1028A1 86 K30 CUCV M1028a2 dually 86 K30 C&C 6.2 4:56s, 4M, 11,000 gvw, ex fire truck, now lowboy dump More square bodies and CUCVs than I care to admit to 2020 Silverado K3500HD Work truck

09-08-2003, 09:30 AM	#7
mkmiller1 Senior Member Join Date: Dec 2000 Location: Magnolia, Arkansas Posts: 1,091	I'm going to be using it to help run a winch. Which setup would you recommend for getting more juice to the winch? thanks, Matthew __________________ GOD is good...All the time! '71 swb custom10 barn find-68K original miles 72 K5 CST rust bucket, but runs and drives 84K miles

09-06-2003, 10:37 PM	#1
mkmiller1 Senior Member Join Date: Dec 2000 Location: Magnolia, Arkansas Posts: 1,091	Need diagram for running dual batteries title says it all. Anyone have the diagram? thanks, Matthew __________________ GOD is good...All the time! '71 swb custom10 barn find-68K original miles 72 K5 CST rust bucket, but runs and drives 84K miles

09-08-2003, 12:19 AM	#6
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	Advantages all depend on how it is hooked up. The way shown on this scematic will let you listen to your radio all night long, or run all the stuff in the camper all night long off of battery number 2, while as soon as you hit the ignition switch, it will switch back to battery #1. Both will charge as the engine runs. If you hook it up with a large cable going from the positive post to the starter (on both batteries) you will get some kick ass amps to crank over in the coldest days and with the highest compression with no problems. If you hook it up to where the positive from # one goes to the starter, then the negitave goes to positive of # 2 and then the negitave goes to ground, then you'll have a 24 - 28 volt system that will fry everything in your truck (with the exception of LED lights, and maybe your starter) and is not recomended.

09-08-2003, 05:06 PM	#8
cojnit Nothing clever Join Date: Jun 2003 Location: Kailua HI Posts: 828	air this would probably be good also for running electric air compressors and stuff when you are showing off your air system to the neighborhood. __________________ Got "the Midas Touch!"

09-08-2003, 11:36 PM	#10
Hooter My other Love Join Date: Aug 2001 Location: Castlegar B.C. Canada Posts: 4,085	the way i do it is have the one battery hooked up normally, have a lead going from the positve side of that battery to one side of a heavy duty solenoid, the other side of the solenoid is hooked up to the other battery and the solenoid is only generated when the key is on the on position, then I hook all the accesories, like my stereo and camper up to the second battery. then power is only drawn from that battery when the key is off, but as soon as the key is turned on, the battery gets linked back up to the charging system again __________________ Castlegar B.C.The great white North (Canada Eh!) Hooter_5@hotmail.com First generation Monte Carlo club pictures of my life

02-29-2004, 01:29 AM	#11
Brian Ringer Junior Member Join Date: Dec 2003 Location: Great Salt Lake Area Posts: 78	Thanks for the info. I have a 72 K5 and I basically want a dual system for when I go camping I can power up accesories and still have a good battery to start up the Blazer.



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