Is The 12 Volt Supply Line Required When Installing The Wiring Kit For a Trailer Brake Controller?

Question

Question:

Hello, The brake controller installation videos include running a 12V power supply from battery to 7-pin trailer plug. Is this 12V power actually needed to operate trailer brakes or is it just for auxiliary power for interior lights, etc on a trailer? Thanks

asked by: Don J

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Expert Reply:

The Wiring Kit # 5506 includes running a 12 volt power supply as this is needed to charge the battery on the Breakaway Kit # 3802346. Trailers with electric trailer brakes are required to have a functioning breakaway kit to stop the trailer shall it become disconnected from the tow vehicle. The 12-volt wire can also be used to power auxiliary lights or other 12 volt accessories in the trailer.

expert reply by: Bud M

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Answer 1

The 7th circuit that is omitted on the wiring diagram of the Brightway Breakaway Kit part #3802346 is an aux circuit that is most commonly a reverse light circuit if it's used at all. The rest of the colors are standard function but if your…

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Answer 2

The Bright Way Breakaway Kit #3802346 cannot be charged through a 12V circuit because that would result in overcharging the battery which is why it has its own battery.

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Answer 3

In order to determine the torque rating for the lug nuts on your trailer you will need to know check out the chart I attached that shows all of the torque specs for all the trailer lugs available based on stud size, wheel material and wheel size.

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Answer 4

To determine the size of the hub assembly you need to purchase you have to determine which bearings are in the old assembly. If the old assembly has L44649 inner bearings, you would use the hub you chose #8-258-5UC1. If the inner bearings are…

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Answer 5

A BT8 spindle would have a diameter of .99 of an inch where the bearings would both install and would have a diameter of 1.24 where the great seal would ride. That would require a hub part #AKIHUB-440-2-1K for an idler hub. A BTR spindle would have…

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Answer 6

Even though I cannot comment specifically on the grease you used because I am not familiar with it, I can tell you the best grease for trailer bearings is a a grease with a rating of GC-LB, which just means it is made to withstand very high…

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Answer 7

To determine the size of the brake assemblies you need you have to measure the depth and width of the hub drum on the axle like what you see in the picture I attached. The most common size is 2-1/4 inch wide like the #T4071600-500 that you…

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Answer 8

Based on the GVWR of your 2019 Jayco North Point 315RLTS it does seem like you have 7k axles. I recommend verifying this information to be sure. These axles typically use the #14125A outer and #25580 inner bearing found in the Timken #TMK92VR.…

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Answer 9

You can verify that the 10-19 grease seal included in Bearing Kit #BK2-100 is the correct one for your spindles by taking two measurements. First you want to measure the rear hub bore where the seal is inserted. The seal's outer diameter needs to…

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Answer 10

The inner diameters of the LM67048 and 15123 both are the same (1.250 inches). That means that a hub with either bearing in the outer bearing would fit your spindle. The part #AKHD-655-6-EZ-K would fit your axle.

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Answer 11

The UFP H-1377 correlates to a Dexter #84 spindle, which is for a 3,500 pound axle. This will utilize an inner bearing #L68149 and an outer bearing #L44649. As this is being used on a boat trailer, I highly suggest going with the etrailer.com…

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Answer 12

I currently have three diffrent self-adjusting assemblies for your boat trailer with 10" x 2-1/4" electric drum brakes which are attached for you below. eTrailer Electric Trailer Brake Kit part #AKEBRK-35-SA (3,500 Axles) Dexter…

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