Dual Battery Option

BlackSilver · October 17, 2004

Our DuraMax trucks come standard with two batteries, hard wired in parallel.

Gas trucks can be purchased with a dual battery option. Is that the same as seen in DMax (hardwired parallel), or is it an auxiliary battery which is isolated from the main battery with a relay/solenoid?

dsrour · October 17, 2004

I'd be interested in adding battery to my Yukon XL 8.1. didnt see it as option. Wonder if anyone has part #'s

Interceptor · October 17, 2004

Actually the batteries are wired in series,not parallel.If they were wired in parallel you would have a 24 volt system which in turn would fry all the electronics of your truck.The dual battery option is the same as the D-Max trucks.

lrymal · October 17, 2004

Actually the batteries are wired in series,not parallel.If they were wired in parallel you would have a 24 volt system which in turn would fry all the electronics of your truck.The dual battery option is the same as the D-Max trucks.

<{POST_SNAPBACK}>

HUH???????????? Careful, re-read your explanation. It is opposite of what is correct. You should be saying:

"Actually the batteries are wired in parallel, not series.If they were wired in series you would have a 24 volt system which in turn would fry all the electronics of your truck..."

Example: When you jump a vehicle's battery to help start the vehicle, you are hooking your jumper cables up in parallel. Postive to positve, negative to negative. That is parallel.

Series:

BATTERY + BATTERY = VOLTAGE TWICE THAT OF SINGLE BATTERY

Parallel:

/BATTERY\

|...............| VOLTAGE SAME AS THAT OF SINGLE BATTERY

\BATTERY/

All you possibly wanted to know:

http://sol.sci.uop.edu/~jfalward/seriespar...elcircuits.html

Interceptor · October 17, 2004

You are correct in that the batteries are wired in parallel.For some reason I wasn't thinking correctly this morning,Sundays are my non-thinking days.

builderpaul · October 17, 2004

2 dual battery option for the gassers. One is like the diesels, just two hooked together. (option TP2) but the other is with an isolator (option 8BO)

The isolated is a more usful option IMO. It also costs more.

Haulin' 8.1 · October 17, 2004

My '01 8.1 has the TP2 dual battery set-up. Is this standard on all 8.1's or was it an option?

Vernon

MS3DALE · October 18, 2004

My '01 8.1 has the TP2 dual battery set-up. Is this standard on all 8.1's or was it an option?

Vernon

It would have been an option on your 8.1, It is standard on the diesels only.

Haulin' 8.1 · October 18, 2004

OK, thanks Dale. I was wondering if GM thought that two batterys were necessary on the big block. With the Ranch Hand bumper my truck is very front heavy and I've been entertaining the idea of moving the batterys into the tool box or under the bed for better weight distribution on the tires. It's something I do with most of my vehicles that have this much power anyways. I've been trying to figure out the battery wiring circuts to get an idea on what would be necessary to accomplish this mod.

Does anyone have a wiring diagram that they can email?

Thanks,

Vernon