What is Function of Black Wire on Trailer 7-Way part # HM20048

Question

Question:

Just purchased 7 way trailer harness. What is black wire for?Looking at your on line diagram there is a purple wire for back up lights but i dont see black.there is no purple on this harness. Hm20048 item number

asked by: Dave W

0

Expert Reply:

The black wire of the Hopkins 7-Way Molded Trailer Wire Connector # HM20048 carries the 12 volt accessory circuit. This is the circuit that will typically power interior lights or charge a trailer's battery.

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

expert reply by: Jameson C

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Answer 1

The Timbren kit part #TTRA1702 is 2-3/4 inches tall and would work great for you to give you additional support. This will provide up to 1,000 lb of additional support.

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Answer 2

The SumoSprings kit #TSS-106-40 does for sure fit your application based on the dimension you just mentioned of 7-3/4 inches from the spring plate to the bottom of the trailer frame. This kit works with dimensions here that range from 6 to 8-5/8…

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Answer 3

Installing a 4,000 lb capacity leaf spring on a trailer with a 3,500 lb capacity axle will make the suspension stiffer which could then in turn minimize the risk of the axle contacting the frame. However, this is not what I recommend to fix your…

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Answer 4

The height of the SumoSprings Trailer Helper Springs w/ Line Relocation Bracket #TSS-106-40 is 4 inches for just the rubber spring portion of it. Since you have 3 inches from the axle to the frame that would indicate that there would be a compression…

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Answer 5

When we installed the SumoSprings Solo Custom Helper Springs #SSR-307-47 on a 2013 Ram 1500 we did not use the included spacer. There are really 2 factors that are going to come into play when deciding if you will need the spacer on your 2016 Ram…

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Answer 6

The most likely cause for the incorrect behavior of your trailer lights, where activating one turn signal causes all trailer lights to blink, is an insufficient ground (or a short to ground) on either the vehicle or the trailer. Since you re-wired…

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Answer 7

Based on the measurements you have given, the correct kit would be the #K71-657-00 Dexter E-Z Flex Suspension Kit - Double-Eye Springs - Triple Axle - 8,000 lbs. You want to use the short equalizers. The hangers you have are designed for the…

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Answer 8

For your Homestead trailer with a 3,500lb axle I recommend the Dexter Trailer Axle Beam with E-Z Lube Spindles #7359765. This is a straight axle that shares your same hub face measurement. The spring center on this axle is only 80" so you might…

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Answer 9

Typically, the black wire is 12-volt power, and the red wire is left turn/brake lights. But you cannot always go by color. If the wiring in question is on the trailer side, then there are two ways to determine which color wire does what function. You…

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Answer 10

Once it's disassembled, once you access the rear of the socket you'll see that it's color coded as shown in the provided photo. The corresponding plug, like #A10-30FDT would wire in the same manner. The screws on each terminal are color…

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Answer 11

The Stromberg Carlson Electric Trailer Jack - Drop Leg - A-Frame - 23" Lift - Item #JET-5000 that you referenced only has one wire that runs from it, the power wire. This wire would need to get run to the 12 volt accessory circuit of the 7-way…

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Answer 12

The red wire is the turn signal wire and will be run to the green wire of your harness if its the right turn signal side, and the black wire will run to the brown wire of your harness. The yellow wire from your harness will run to the left turn…

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What is Function of Black Wire on Trailer 7-Way part # HM20048

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