Hodge's Dual Battery System

[Cuppa]

Got all the bits and pieces, ready to go. Just wondering one thing. The negative from battery to battery. I can just ground the secondary, but am I right to also run a cable between each battery too ??

Yes you can just run a neg cable between the two. It should be the same size cable as the positive. In many cases this is more reliable (& can also make any future fault finding simpler) than using chassis earth.

[Hodge]

Yes you can just run a neg cable between the two. It should be the same size cable as the positive. In many cases this is more reliable (& can also make any future fault finding simpler) than using chassis earth.

Thanks Cuppa. I don't see many people doing this most just ground it to chassis so I thought I better ask if there was a "negative" in running a hard negative between batteries as well as grounding it. I'll do both.

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[Cuppa]

Thanks Cuppa. I don't see many people doing this most just ground it to chassis so I thought I better ask if there was a "negative" in running a hard negative between batteries as well as grounding it. I'll do both.

Sent from my SM-G900I using Forum Runner

No advantage in doing both. If intending to fit solar down the track I feel there is an advantage to essentially keeping the ’house’ electrics separate to the vehicle electrics.

[Hodge]

Took advantage of good weather today, and finished the dual battery system. Was hard finding a spot for the redarc unit so, i made a stand-off bracket, for it, and fitted the fused on top, works a treat and looks neat. Ran 2 twins to the rear, which I'm yet to terminate into a some form of fridge plug? I'm not sure what the ARB fridge plugs into until I buy one. And one of the circuits will be just tapped into a 6 way box and spread from there onward to lights and other gadgetry.

Attachment 47164Attachment 47165

[Hodge]

So I want to wire up my spare wheel bracket/light for 2 functions. A reverse light and camping/general rear light.
Whats the best way to go about it? Put a relay in, that's triggered by the reverse hot wire, and also have a switch that triggers also triggers the relay when I want the light on manually. Does this sound feasable?

[mudski]

Looking neat mate. As for the reverse light, that's how mine is setup. Comes on with reverse, but I can also turn the rear light on via a switch. Which also turns on the reverse lights to but it's no issue to me.
How it's done was via a relay but I can't remember how. MudRunnerTD showed me how ages ago in a thread here. I'll see if I can find it if you like bud.

[megatexture]

A few option in here for your wiring re the reverse light http://www.nissanpatrol.com.au/forum...n-switch/page2

[Flex]

Hodge loved how you cable tied the spare fuse. Great idea!!!

[mudski]

Heres the thread that Daren helped me with. Starts from about post #19...
http://www.nissanpatrol.com.au/forum...=reverse+light

[Hodge]

Thanks fellas. Have been going through those threads and some other reading ... It's amazing I work with power every day yet car electrical gives me a headache. lol
I was looking at Darrens drawing, and it is perfect for what I need... however. With that setup, when I manually turn on the light, the reverse lights will turn on too. This is something I want to avoid.
In a nutshell I need a relay that can be triggered from 2 different sources ( reverse light and manual switch), yet not interconnect those 2, if that makes sense ?

Attachment 47200