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

0

Answer 1

The Progressive Dynamics PD9200 Series Inteli-Power Converter - 12 Volts - 45 Amps #PD9245C is 8-1/4" long x 7-1/4" wide x 4-11/16" deep. If this fits in the slot you are referring to in the bottom of the power panel then you will be…

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Answer 2

The Progressive Dynamics Replacement Section #PD4655V does have a jumper to change the charging profile to lithium compatible. You'll simply need to move the black jumper over from the WIZ side to the LI side.

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Answer 3

The spindle dimensions are as follows: A is the mounting dimension, B is the seal dimension, C is the inner bearing surface, D is the outer bearing surface and E is the diameter of the threaded portion of the spindle for spindle nut selection. Say…

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Answer 4

Many states in the U.S. and provinces in Canada require break away kit. In order to determine the specifics for where you live and where you plan to travel, you can check with the state and federal departments of transportation for the area. Specific…

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Answer 5

It sounds like you are speaking of the wires for the brake magnets. If this is correct, you will need to connect one of the wires to the brake controller output wire on your trailer connector and the other wire will need to be grounded to a clean…

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Answer 6

This is a common question we get on lights like the LED Trailer Tail Light with License Bracket part #328-003-81LBM1. The original colors you have are the traditional trailer wiring code so brown=taillights, red=turn/brake and white is ground. On…

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Answer 7

Normally, the green wire on the right side carries right turn signal and brake light functions and the brown wire carries running light functions. On the left side, the yellow wire carries left turn and brake lights and the brown wire again carries…

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Answer 8

Your 4-pin/5-wire wiring harness is what is called a "wishbone" type which simply means that there are two separate running light wires, one brown and one pink. This allows a separate running light wire for each side of the trailer which…

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Answer 9

Typically the black wire on a trailer 7-Way like the Hopkins #HM20048 is for 12V power. It will run from the positive battery terminal on your tow vehicle back to your trailer battery or whatever you're needing to power (like interior lights).…

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Answer 10

The light that indicates that the 12 volt circuit is hot is normal and it will not drain the battery. Think of it as the battery having a really long positive terminal that just extends to the rear of the vehicle. If nothing is drawing power from it,…

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Answer 11

The 12V wire at the vehicle-end trailer connector being hot even when the truck is off can vary depending on the application. For all aftermarket hardwiring installations of a 7-Way wiring harness, the 12V wire will be hot at all times, even when the…

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Answer 12

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

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