Is a Dead Battery Causing Fuses to Blow When I Plug In My Trailer

Question

Question:

When I plug in 7 pin it blows fuse. I tested it and open circurt on running and brake lights. My battery is dead on trailer and 15 years old not sure if that could be it. It has a sealed thing called a charger in battery box.

asked by: Butch L

0

Expert Reply:

There could be a couple causes of this. It could be the battery, since a dead battery can mimic an overload and cause fuses to blow but there also could be an issue with the wiring as you've noticed with the issues on the running and brake lights. I would start by taking the battery to get tested and replaced if needed, but I also recommend going through all of the wiring and making repairs where needed.

I will also say that a trailer battery typically goes bad after this length of time, so replacing it should be strongly considered.

expert reply by: Erik B

0

Answer 1

I do have a handy trailer wiring FAQ article that would be perfect for you. I have included a link to it. I have also included a picture that shows the typical wiring diagram of a 7-Way round pin trailer side connector. As you can see, the 7-way…

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Answer 2

Sounds like there is an electrical short somewhere in the jack circuit. Inspect the trailer jack wiring to see if there is any loose connections and frayed or damaged wiring that could be shorting causing the fuse to blow. Also, if the jack has…

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Answer 3

It sounds like you are looking for some rain gutter spouts like the Camco RV #CAM42452. These spouts will direct rain water 3 inches away from your RV and prevent those nasty black streaks on the RV exterior. These particular spouts also feature…

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Answer 4

If you didn't have a battery used with your breakaway system there'd be nothing to power the brakes in the event of a disconnect so you couldn't use just a switch like the part #FA80-00-2040 by itself. You'd instead…

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Answer 5

When it comes to choosing between the Blue Ox Patriot #BLU37TR and the Brake Buddy Select 3 #HM39524, these systems are extremely similar in their setup and functionality. Both of these systems provide proportional braking in a compact and easy to…

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Answer 6

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…

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Answer 7

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…

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Answer 8

The Adco SFS AquaShed Cover for Bumper Pull Trailer part #290-46004 would be an excellent option for a 7 x 14 V-Nose Enclosed Trailer. The Adco SFS AquaShed Cover for Bumper Pull Trailers is actually designed for horse trailers but it will work well…

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Answer 9

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 10

Both the Roadmaster and Blue Ox tow bars are great options. But if it was my decision to make I would go with the Blue Ox Avail part #BX7420 as we have found that the Blue Ox tow bars are a little easier to connect and disconnect from. Also this tow…

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Answer 11

The OEM prep package consists of 4 "pucks" in the bed of the truck that will allow you to drop in puck style hitches for easy installation and removal, that gives you a completely clear bed when not in use. The B&W Companion OEM 5th…

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Answer 12

You will have to go with a sliding hitch to allow the trailer to make tight turns. For a trailer 8 feet wide the only bed length that's going to allow 90 degree turns without a slider is a stationary hitch. That being said you have two options.…

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Is a Dead Battery Causing Fuses to Blow When I Plug In My Trailer

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