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Old 10-21-2015, 07:59 PM   #1
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12 Volt Circuit Tester

Just a quick question about a 12 volt circuit tester (probe and light). I don't know where I could ground a 12 volt circuit tester inside a motorhome? Thanks in advance.

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Old 10-21-2015, 08:08 PM   #2
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On mine, the ac outlet ground pin is tied to chassis ground.

You can always get a long wire and ground it at a cigarette lighter plug.

Each coach is a little different.


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Old 10-21-2015, 09:01 PM   #3
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Generally both coach and chassis power systems will be bonded to the chassis. So any metal tied to the chassis. The places dpinvidic said will work too. Negative post on either coach battery or chassis battery would work too. Generally there will be a big negative lead going to the 12 volt side of your power center and a terminal block where they can terminate ground wires for the smaller 12 volt branch circuits for lights, etc. that would work too.
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Old 10-21-2015, 09:05 PM   #4
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Thank you for your guidance. I am sure appreciate.
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Old 10-22-2015, 06:31 AM   #5
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There are many grounds but you can go to any auto parts store, or Radio shack, Or WAl-mart (Auto section) and get a coil of wire, say 14ga or even 20ga.. Put a clip on one end and then you can roll it out to any handy frame part or grounded point.

I never have to do that as there are always ground points nearby.. Any frame part and many other points are grounded.
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12 volt, test

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