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Recommended Breakaway Switch Kit For Trailer and How Does It Get Wired?


trailer breakaway application from the brakes at the axle to the front starting from scratch this is homemade


Expert Reply:

For a breakaway switch I recommend going with the Hopkins Engager Push-To-Test Trailer Breakaway Kit with Built-In Battery Charger - Top Load # 20400 as it includes the battery with a built in battery charger and tester needed.

To wire the # 20400 you will make the following connections:

Black wire from the battery to the 12v power wire from your 7-way connector
White wire from the battery to the ground wire on your 7-way connector
Blue wire from breakaway switch to brake output wire running to your trailer brakes
Black wire from break away switch to blue wire from battery

You will want to use heat shrink butt connectors # DW05744-5 and # DW05745-5 to make sure all of your connections are secure and weather tight.

I included the written instructions, an installation video of the # 20400, and a wiring diagram for you to take a look at.

Hopkins # 20400 Wiring Diagram
Hopkins # 20400 Wiring Diagram
(click to enlarge)
expert reply by:
Samuel C

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