How to Wire a Trailer Break Away System and Connect Auxillary Battery and Brake Wires  

Hey Jon, It sounds like your trailer is already set up with electric drum brakes and you're seeing the break-away switch/battery, which is a requirement depending on the weight of the trailer. The trailer should have a 7-way connector to plug…

On this page (typically below the product links) there is a helpful link section that will have the install instructions fo the Hopkins Breakaway kit part #20400 that you referenced. I also attached an install video that shows the kit installed as…

I was able to find the 126003 hub and was able to determine that it is a 3,500 lb hub/drum with a 5 on 4-1/2 inch bolt pattern just like the #AKHD-545-35-K that you referenced. This hub will work as a replacement for your Lippert.

To charge the battery in the Engager Trailer BreakAway Kit, #20099, you can attach the wire from the 12 volt circuit on the trailer side 7-Way (1 oclock position on the back of the trailer side 7-Way where the wires attach) to the input wire on the…

When wiring a trailer connector, it is best to wire by function, as wire colors can vary. We have an excellent wiring diagram on our website, I will provide you a link so you can look at it. If you are looking at the inside of the trailer connector…

Typically people will let the breakaway battery run the breakaway system and then would use the accessory battery to power the interior lights etc. This tends to work the best since your breakaway battery needs to always be charged and interior…

I have included a picture for the trailer 7-way connection and the typical wire colors used and their location. As the wire colors are not standard for every trailer you will want to confirm what each wire does. The easiest way is to use a 12 volt…

On a 7 pin round which is the common connection on a semi trailer, the clearance/marker lights are at the 10 o clock position when you look at the trailer wiring connection. When looking at the connector on the back of the truck, that will put the…

The best way to power the interior lights in your trailer is with its own independent battery. You will not want to use the breakaway battery. The breakaway battery is only designed to operate the breakaway and will drain extremely quickly,…

If the light bulb is disconnected from the socket, there should not be any continuity between the running lights (brown wire) and the ground (white wire). It sounds to me as if you may have a shorted or pinched wire somewhere along in the…

I can certainly point you in the right direction. We do not have literature that will tell us wheel specs based on a year make and model of truck. Provided the wheels currently on your 2003 International Harvester 4400 MD are a 16" x 6"…

In order to install a two wire breakaway switch like the Replacement Breakaway Switch with Cable and Pin part #3802348 to an existing trailer battery you will want to attach one of the wires to the brake output signal (usually blue) on the trailer…