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Wire Colors Explained for Installing the RV Tail Light - Stop, Tail, Turn 30-92-001

Question:

Would like to know what the red black white and green wires go to wires on harness

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Expert Reply:

On the trailer light part # 30-92-001 the white wire is for the ground, the green for the running light circuit and then the black is for the stop/turn signal circuit which is brighter.

I also attached an install video for this light for you to check out as well.

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Jameson C

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Follow up Questions

Caroline

I have 3 tail lights on each side of my 5th wheel RV. Above the license plate there is a rectangle hole for l3 light assembly. In the hole there is 2 white wires, 2 green wires 1 yellow, 1 red, and 2 black wires that come from the license plate light. One of the black wires has a blue butt connected on it with no wire attached. On the Bach of the fixture the first light has 1 black & 1 green wire. The 2nd light has 1 black & the third has 1 black, 1 green & 1 white shoved under a river. Could u please help me hook this mess up?

Etrailer Expert
Reply from Jon G.

What you're going to need to do is hook your trailer up to your tow vehicle and then run through the various light functions and test those wires to see what they are for. You'll also have to apply power to the different wires on your light fixture to see what each wires does - then connect your wires accordingly. I really wish I could just up and tell you what all you need to connect but the problem is that even though there are common wire colors for the various trailer light functions, not everybody follows this pattern. What's more is if your 5th wheel is older and has had previous work done on it then I'd just be totally guessing as to what your connections would be since they could have swapped out different wire colors.

Bev C.

My camper was two lights in taillights, one under the other. I’m looking for a I guess it aluminum bar that goes across the bulbs and is screw-in to hold bulbs in place. Do you have this and is there a name for it?

Etrailer Expert
Reply from Chris R.

I'm not quite sure which part you are referring to. Is this a specific component within the tail light assembly? Can you see a model number printed anywhere inside the housing?

Kevin O.

Should yellow wire be connected to tail light? If so, where?

Etrailer Expert
Reply from Chris R.

This depends on what function that yellow wire carries on your trailer. Most likely it's the stop/turn circuit on the left side - which if true would be connected to the black wire on the above-mentioned tail light. If you're unsure then you will need to actually test that wire on the trailer to see what function it's tied to.

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