Good Sam Club Open Roads Forum: Red wire, black wire and white wires
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 > Red wire, black wire and white wires

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CA Traveler

The Western States

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Joined: 01/03/2004

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Posted: 06/19/20 06:24am Link  |  Quote  |  Print  |  Notify Moderator

Ohm test is a start but may not be adequate and yield low ohms on both - and + wires. The option I use is a series load and I've used a light bulb as suggested. You may need a load that draws more amps and find and turn off switches etc that could lead to false conclusions on the positive side.

Once the weres are connected With a 50 year old RV it would also be a good idea to leave a heavy draw load in series while while you turn on and test everything inside with the view that the series load will have a voltage drop.

That second set of wires could also be for trailer brakes.


2009 Holiday Rambler 42' Scepter with ISL 400 Cummins
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swimmer_spe

Sudbury, Ontario, Canada

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Posted: 06/19/20 10:50am Link  |  Quote  |  Print  |  Notify Moderator

CA Traveler wrote:

Ohm test is a start but may not be adequate and yield low ohms on both - and + wires. The option I use is a series load and I've used a light bulb as suggested. You may need a load that draws more amps and find and turn off switches etc that could lead to false conclusions on the positive side.

Once the weres are connected With a 50 year old RV it would also be a good idea to leave a heavy draw load in series while while you turn on and test everything inside with the view that the series load will have a voltage drop.

That second set of wires could also be for trailer brakes.


The trailer brakes makes sense.... So, is there a common wire code for them?

CA Traveler

The Western States

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Posted: 06/19/20 11:55am Link  |  Quote  |  Print  |  Notify Moderator

swimmer_spe wrote:

CA Traveler wrote:

Ohm test is a start but may not be adequate and yield low ohms on both - and + wires. The option I use is a series load and I've used a light bulb as suggested. You may need a load that draws more amps and find and turn off switches etc that could lead to false conclusions on the positive side.

Once the weres are connected With a 50 year old RV it would also be a good idea to leave a heavy draw load in series while while you turn on and test everything inside with the view that the series load will have a voltage drop.

That second set of wires could also be for trailer brakes.


The trailer brakes makes sense.... So, is there a common wire code for them?
No, not to mention the RV mfg added wire.

Think of it this way: There may be a recommendation but there is no standard or inspection requirement. And you're the mfg floor manager and you ran out of black wire but have a ton of pink wire. What do you do?

MEXICOWANDERER

las peƱas, michoacan, mexico

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Posted: 06/19/20 05:53pm Link  |  Quote  |  Print  |  Notify Moderator

Send someone to the scrap seller and purchase that big roll of brown.

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