How to Connect Wiring to Marine Battery for Interior Lights of Enclosed Trailer to Work

Question

Question:

Hi, I have an enclosed trailer with electric brakes. I want to install a marine battery inside the trailer in lieu of small breakaway battery. My truck and the trailer have a seven wire set up. I also installed interior lighting and reverse lights on trailer. I want to charge battery when truck is hooked up. I also want to be able to have reverse lights work when backing up. I want to have lights powered by marine battery when truck is not hooked up. I also want interior lights to work even if marine battery is not hooked up but trailer is plug into truck. I do have a terminal block inside trailer to connect trailer plug and lights for brakeslighrs turn signals and running lights. Thanks

asked by: Kenneth S

0

Expert Reply:

To charge the marine battery in your trailer you need to run some wiring from the pin in the 11 o'clock position on your trailer 7-Way to your marine battery (see attached photo). This should be the same wire that your breakaway kit is connected to.

If you have a junction box like part # PK52248 inside your trailer then you will just need to connect your battery to that 12V power wire. This will charge your battery whenever your trailer 7-Way is connected to your truck.

For your reverse lights to work you need to run wiring from your reverse lights to the center pin on your trailer 7-Way. As long as your tow vehicle is sending power to that circuit when in reverse it will allow your lights to work.

The easiest way for your interior lights to run if your trailer is connected to your truck or not would be to run them directly to your battery. If you wanted to bypass your marine battery whenever your trailer was coupled then that would mean you have to change the circuit that your interior lights are on whenever your trailer is not coupled and you want to use the lights. I recommend just running your inside lights off of your battery since it will be charging anyways.

Let me know if you need any equipment to complete this installation and I can help you out. If your junction box uses terminal then you would obviously need ring terminals in addition to any wiring, switches, or butt connectors.

expert reply by: Jon G

0

click to enlarge

Answer 1

I have a solution for you, but there is not a plug-in adapter to convert your RV's taillights from combined wiring to separate wiring. If you are pulling a trailer with separate lighting, you will want to use a 2-wire to 3-wire converter. I…

view full answer...

Answer 2

The difference between the Class II and Class III hitches has to do with their Gross Trailer Weight (GTW), their Tongue Weight (TW), and their Hitch Receiver Size. Class II trailer hitch receivers have a 1-1/4 inch receiver and can be rated up to…

view full answer...

Answer 3

A 4-Way trailer connector has the basic lighting functions only; running lights, left turn signal and brake lights, right turn signal and brake lights, and ground. A 7-Way has these functions and a 12 volt circuit, a circuit for electric trailer…

view full answer...

Answer 4

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.

view full answer...

Answer 5

According to Blue Ox, it'll take an experienced installer about 4 to 5 hours to complete the installation of their #BX1128 Base Plate Kit on a 2016 Jeep Grand Cherokee. The install isn't what I'd call super-difficult, but the installation…

view full answer...

Answer 6

Hi Paul, you’re definitely on the right track here, and I can help you narrow this down with confidence. With your tandem 3,500 lb Dexter axles and 33 inch spacing, both the Dexter EZ Flex part #K71-652-00 and the Lippert Road Armor part #LC53CK are…

view full answer...

Answer 7

To install a Redarc Tow Pro Liberty in your 2023 Toyota Tacoma Sport you will need the following parts: Redarc Tow-Pro Liberty Brake Controller item #RED24FR Plug-and-Play Wiring Harness for Redarc Tow-Pro Trailer Brake Controllers item #RED99FR…

view full answer...

Answer 8

Hello Sam; that is a great question! I reached out to Furrion and you will be able to use the Furrion Chill Cube #FR69TD (white) or #FR49TD (black) with your furnace. However, the remote is not capable of operating the furnace at this time. Also, we…

view full answer...

Answer 9

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…

view full answer...

Answer 10

That's a very good question, we tend to be extra cautious and say to use 10 gauge wire because that would be more than enough. When you get into longer trailers that will end up using a lot of wire the heavier gauge wire becomes more necessary.…

view full answer...

Answer 11

The #84 spindle is just a common way to identify the spindle dimensions typically used for 3,500 lb axles. So instead of listing out the parts, people can just say they have #84 spindles and it's easier to know what fits it. The CE Smith Trailer…

view full answer...

Answer 12

Hey Jon; I was actually just talking to Furrion about heat options for the Chill Cube yesterday (1/21/2025). At this time, the only way to have heat with this unit is through a furnace on a ducted setup. The Furrion Chill Cube RV AC w/ Air…

view full answer...

How to Connect Wiring to Marine Battery for Interior Lights of Enclosed Trailer to Work

Product Page this Question was Asked From

Featured Help Information

Miscellaneous Media

Continue Researching