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Old 06-02-2014, 08:58 PM   #31
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Join Date: Dec 2012
Location: Edmonton, Alberta
Trailer: 1979 Boler B1700
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Originally Posted by Tonny LR View Post
Color coding for 12v wiring, is the red wire positive same as car battery?
For one thing, most +12V wiring in a typical car is not red; for instance, the cap over the positive cable on the battery is typically red, but the cable attached to it is often (including on every vehicle I own) black. You can't count on colour coding unless it is shown a wiring diagram specific to that wire in that vehicle... and some joker hasn't changed it.

Red in the wiring from a tug to a trailer using the original Bargman scheme for their 7-way connector is left combined turn/stop. In the SAE standard J560 which applies to the entirely different 7-way connector used on commercial trucks (and in European 12N and 13-pin trailer connections), red is the stop (brake light) wire. In the wires attached to common trailer brake controller, red is the signal from the brake pedal switch.

In most trailers that I've seen, both battery connections and power to stuff such as lights is black for positive and white for negative (ground).

So... specifically where are you asking about? Escape interior lights? The furnace wiring (like Myron's post)?

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Old 06-03-2014, 07:51 AM   #32
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Trailer: 2014 Escape 19' and 2016 GMC Yukon SLT SUV.
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Hi Brian B-P,
I am referring to Escape 12V interior lights. I had ETI installed 2 extra set of 12V wires in the under bed stroage area. ETI 12V wires come in red and black. I like to make sure which color is positive. I am not that familiar with electrical stuff and am afraid of making an error of reverse polarity. Don clarified that red wire is positive. Thank you for explaining electrical polarity, and not to depend on color coding.
Tonny LR

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Old 06-03-2014, 08:07 AM   #33
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Spend $10 on an inexpensive multimeter, then you don't need to guess...

2013 Escape 19 ("The Dog House") , 2012 Nissan Frontier
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Old 06-03-2014, 09:23 AM   #34
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Trailer: 2012 15A
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Could you look at the back of the main electrical panel and see which color wire is connected to which pole psition?

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