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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2oldman

Mecca

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Posted: 06/18/20 07:42am Link  |  Quote  |  Print  |  Notify Moderator

Turn everything off. Hook up what you think is right. Turn on a fan. If it runs backwards, reverse wires.

wapiticountry

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Posted: 06/18/20 08:03am Link  |  Quote  |  Print  |  Notify Moderator

CA Traveler wrote:

The tape is 3M Scotch 35 and comes in a various colors.

The best black tape I've ever used bar none is 3M Scotch Super 88.

These are vinyl electrical tape.

I use heat shrink on new projects when the wire ends are available.
Vote #2 for Super 88. That is one product where paying premium prices is actually a bargain.

naturist

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Posted: 06/18/20 12:47pm Link  |  Quote  |  Print  |  Notify Moderator

Given that it is easy for a 45 year old trailer to have non-standard wire colors, you will find a VOM to be essential to figuring anything out, and that will call for someone who understands electricity too. If you lack either the tool or the understanding, it's a crapshoot with very high odds of bad, bad juju and a very high probability of letting the magic smoke out. My advice is don't attempt it yourself. Get somebody there, on the ground, VOM in hand to help you.





JaxDad

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Posted: 06/18/20 01:29pm Link  |  Quote  |  Print  |  Notify Moderator

It seems a few folks are over thinking this.

Take a 12 volt light bulb and some scraps of wire, connect one side of the light bulb to the positive battery terminal and start connecting wires to the other side of the light bulb. Negative (ground) wires will make the bulb glow brightly, a very faint glow or no light at all means you have a positive wire.

swimmer_spe

Sudbury, Ontario, Canada

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Posted: 06/18/20 03:50pm Link  |  Quote  |  Print  |  Notify Moderator

OP here.

A few things...

1) No shore power available there. So, that test is out.

2) No power jack.

3) I do have my truck, so plugging in the wire will work. I also own a multimeter, but I was hopeful that there was some sort of standard....

Boon Docker

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Posted: 06/18/20 05:47pm Link  |  Quote  |  Print  |  Notify Moderator

Set your multimeter to ohms. Ground one probe to the frame then touch the other probe to each wire separately.
A reading of zero to 1 ohm means that wire is negative.

Bobbo

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Posted: 06/18/20 08:49pm Link  |  Quote  |  Print  |  Notify Moderator

Boon Docker wrote:

Set your multimeter to ohms. Ground one probe to the frame then touch the other probe to each wire separately.
A reading of zero to 1 ohm means that wire is negative.

Be sure that no wires are connected to the battery's positive terminal. Touch a hot wire like this and you will damage the meter.


Bobbo and Lin
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RJsfishin

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Posted: 06/18/20 09:14pm Link  |  Quote  |  Print  |  Notify Moderator

I believe there is a sorta standard. For 40 yrs, every 12v assesory you will ever buy has either black and white, or red and black for power. The red and black is always pos. I call that a sorta std. If you would install a black/white cable using the white as pos it would be wrong. Same w/ a red/black cable, a black pos would be wrong !


Rich

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swimmer_spe

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Posted: 06/18/20 10:41pm Link  |  Quote  |  Print  |  Notify Moderator

Boon Docker wrote:

Set your multimeter to ohms. Ground one probe to the frame then touch the other probe to each wire separately.
A reading of zero to 1 ohm means that wire is negative.


Great idea! I never thought of that.

swimmer_spe

Sudbury, Ontario, Canada

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Posted: 06/18/20 10:42pm Link  |  Quote  |  Print  |  Notify Moderator

Bobbo wrote:

Boon Docker wrote:

Set your multimeter to ohms. Ground one probe to the frame then touch the other probe to each wire separately.
A reading of zero to 1 ohm means that wire is negative.

Be sure that no wires are connected to the battery's positive terminal. Touch a hot wire like this and you will damage the meter.


I know how to use one. I was hoping that it would have been simple as white is always ... The idea of the ohm test on the frame and wires will help.

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