Where do Trailer Wire Colors Green, Yellow, Brown and Red Run To

Question

Question:

I have 4 wires coming from trailer green-yellow-brown-red . Coming from truck are white-brown-yellow-green. What goes to what?

asked by: Walter M

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Expert Reply:

Most likely the colors would match with the exception of the red wire on the trailer going to the white wire on the truck. The white wire is the ground circuit so you can trace the RED wire on the TRAILER to see if it attaches to a metal surface on the trailer or to the grounds of all the lights.

I attached a help article on trailer wiring for you to check out as well.

expert reply by: Jameson C

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Answer 1

The three most common lug stud sizes for a trailer are 1/2"-20, 9/16"-18, and 5/8"-18. In order to make sure you get the correct lug nuts you need to measure the lug studs on the trailer now as we have no way to look this up for…

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Answer 2

On a 4-Way flat trailer wiring harness, white is the ground, brown is running lights, yellow is left turn signal and green is right turn signal. It sounds like your trailer has a wishbone harness. A wishbone harness splits the running light circuit…

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Answer 3

I would start by checking location 74 which is the relay for the trailer tow left-hand stop/turn function. Another place to check is location 100 which is the trailer tow turn signal function. You could also check location 70 which is the trailer tow…

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Answer 4

As you may have already found, 5200 lb, 6000 lb and 7000 lb axles can all use the same components including inner/outer bearings, hubs and brakes. Here are some other things they share in common: Dexter 5200 lb Regular Duty Axle - 0.180 inch tube…

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Answer 5

If the trailer has 8 lug hubs that would indicate typically that the capacity for each axle is at least 5,200 lbs. Now if you go out and measure the outside diameter of the axle you'll get an even better idea. Typical Axle Diameters Based on Axle…

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Answer 6

We checked with Dexter and P-21 just indicates where the axle was made. With the serial number we could track down more info on your axle. However, in the mean time you could pretty easily get the bearing numbers off of your current bearings and then…

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Answer 7

The connector should be located underneath the dash to the left of the steering column. It may be taped to another wire and tucked up and out of the way. I have linked a video installation of brake controller being installed on a 2007 Toyota Tundra…

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Answer 8

A 5.30x12 tire such as part #AM10064 is around 21.7" diameter x 5.3" wide whereas a 5.70x8 tire such as part #AM10013 is around 18.1" diameter x 5.7" wide. Therefore, the new tire will be 3.6" taller x .5" narrower than…

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Answer 9

It sounds like your trailer tail lights you are using now ground through the mounting hardware. That would be why there are only 2 wires. One of those two wires is going to be for turn signal/brake lights and the other is going to be for running…

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Answer 10

I would be happy to help you find the correct tires for your new to you 1994 Coleman Destiny Cedar XL. Since the distance between the adjacent holes in your wheels measured 2-3/4" apart, you are correct that you have the 5 on 4-3/4" bolt…

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Answer 11

To select a set of replacement idler hubs for your Fleetwood Destiny trailer you want to match up a few characteristics from your originals. These include the axle weight capacity, wheel bolt pattern and the bearing set used in the hubs. A…

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Answer 12

Going by the colors that you mentioned, it sounds like you have the typical set-up, green wire for right turn and brake, white wire for ground, yellow wire for left turn and brake, brown with green wire for right side running lights, and brown with…

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Where do Trailer Wire Colors Green, Yellow, Brown and Red Run To

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