12V DC wiring question

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ronnie
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Real Name: Ronnie
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Fri Jul 14, 2017 10:13 am

I am in the process of replacing two external hella plugs on my Echo Chobe with brad harrison plugs. The hella plugs were wired with just one negative wire to the metal bracket holding the plugs in place.

Can I just split the negative wire into two to wire the two brad harrison plugs? My instinct reckons it should be fine but I would just like to confirm with the guys that know.

Thanks

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Mud Dog
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Real Name: Andy

Fri Jul 14, 2017 2:59 pm

It will work but the question is what you want to run off the B H plugs and will the wiring be able to handle the draw. The Hella plugs are designed for a much lower amperage draw than the B H plugs.

If your trailer battery negative is connected to the chassis / body, then it might be better to ground the earth connection close to the plugs (one for each plug) with a suitable gauge wire but that still leaves the positive wire that might be inadequate for your planned draw across the two plugs. If the fuses are still original values for the original wiring, then the fuse will protect the positive wire ...., you might however have to replace it every so often if it blows because of excessive current draw. Alternatively you will have to run new suitable gauge wire. :winkx:
When your road comes to an end ...... you need a HILUX!.

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Life is like a jar of Jalapeño peppers ... what you do today, might burn your ass tomorrow.
Don't take life too seriously ..... no-one gets out alive.
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ronnie
Low Range 4WD
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Posts: 186
Joined: Mon Jul 13, 2009 2:19 pm
Town: Durbanville
Vehicle: Totota Fortuner 2006 4.0 V6 4x4; Long Range fuel tank; AmadaXtreme suspension; C-Tek D250S dual battery system
Real Name: Ronnie
Club VHF Licence: HC 141

Fri Jul 14, 2017 3:04 pm

Thanks Mud Dog. Wiring seems thick enough and the two plugs will be for two camping fridges so 2.5 to 3 amp draw. Wouldn't run anything like a compressor from those plugs. What had me doubting myself was the setup with two positive wires and only the one negative. I do have some spare in-line fuses I could use on the positive wires. I would have run new wires but getting it through the conduits and around all the bends will probably drive me crazy.

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Mud Dog
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Vehicle: '90 SFA Hilux DC 4X4, Full OME, 110mm lift. Brospeed branch, 50mm ss freeflow exhaust. 30 x 9.5 Discoverer S/T's on Viper mags. L/R tank. (AWOL) '98 LTD 2.4 SFA, dual battery system. Dobinson suspension, LR tanks, 31" BF mud's.
Real Name: Andy

Fri Jul 14, 2017 3:13 pm

:winkx:
When your road comes to an end ...... you need a HILUX!.

Image
Image

Life is like a jar of Jalapeño peppers ... what you do today, might burn your ass tomorrow.
Don't take life too seriously ..... no-one gets out alive.
It's not about waiting for storms to pass. It's about learning to dance in the rain.
And be yourself ..... everyone else is taken!

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