adding rear battery, ground to front batt or chassis?

[ctt0002 10+ year member]

HOw do you know if you have a good ground? say for instance you want to test out the ground from the rear and test the one at the front to see which one is better but how to tell the difference?

 

[Mr. Opportunist 10+ year member]

Run to front batt.

 

[jco1385 5,000+ posts]

HOw do you know if you have a good ground? say for instance you want to test out the ground from the rear and test the one at the front to see which one is better but how to tell the difference?

the ohm setting on the DMM

lowest # wins

 

[skmfkr 5,000+ posts]

how do i test the resistance of the chassis? i only know how to do it with one piece of wire

 

[forbidden 10+ year member]

http://www.the12volt.com/installbay/forum_posts.asp~TID~49445~PN~1

 

[evildave101 10+ year member]

do both, it cant hurt.

 

[Louisiana_CRX 5,000+ posts]

I ran 6 runs of 1/0 in my CRX 3 POS and 3 NEG from the main battery to the rear battery....

 

[mcsoul 10+ year member]

Could you run 1/0 from the sheet metal you ground to in trunks closest point out to the engine cage, as long as big three is done. Just to be cheap with the 1/0, or if you only have a few odd lengths.

 

[kovemaster559 5,000+ posts]

buss bars from front to back to get anal.

 

[skmfkr 5,000+ posts]

well i ordered 2 runs of 1/0 tonight, i was planning on wiring to front batt anyways

 

[jrwalte 10+ year member]

Before installing the negative, after big three is done, I'd test the negative run at the neg bat and alternator (engine block). I'd test it while playing a test tone and see which one maintains higher voltage. Ohm test doesn't work to determine the best run. It doesn't take into account how the path will handle high amperage.