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Old 04-30-2015, 02:36 PM   #1
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Will my tail and brake lights work without a battery hooked up?

Hey all,

I haven't posted in a long time but I have a question that I'm hoping to get a quick answer on. I am picking up out Jayco 28 BHS trailer which has been stored for the winter. I grabbed the hitch, I grabbed the keys but forgot the battery. Will my tail and brake lights work even though the battery isn't there? I'm trying to avoid having to go get it as I'm towing the trailer home and can install it once I'm home.

Christine
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Old 04-30-2015, 02:40 PM   #2
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They will work. Your break away switch will not if your trailer should unhitch.

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Old 04-30-2015, 02:43 PM   #3
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YAY!!!

Thank you so much. What is a break away switch?


Christine
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Old 04-30-2015, 02:51 PM   #4
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Quote:
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YAY!!!

Thank you so much. What is a break away switch?


Christine
It's the box the braided ss cable is connected to that if you should become unhitched will engage the electric brakes fully to stop the trailer. Your trailers battery supplies the power to the brakes should the pin get pulled.
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Old 04-30-2015, 06:29 PM   #5
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All trailer safety lights are powered by the tow vehicle through the trailer cable when connected...

It is a DOT LAW that all trailers equipped with electric brakes must have an installed battery source for the electric brakes to use in case the trailer becomes disconnected from the truck when going down public highways.

This could affect your Insurance claim if your run-way trailer has caused destruction or worse if it has been determined that you did not have a working electric brake setup to immediately stop the trailer when disconnected.

Sort of behooves you to have a working system as required by the STATE DOT...
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Old 04-30-2015, 08:39 PM   #6
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Roy hit the nail on the head with good advice
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Old 04-30-2015, 08:47 PM   #7
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Quote:
Originally Posted by devonquest View Post
YAY!!!

Thank you so much. What is a break away switch?


Christine
(*sigh*)

Murff
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Old 05-01-2015, 10:29 AM   #8
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This is a typical BREAK-AWAY Switch Assy. This assy is installed on the trailer frame and the long plunger cable is attached to the truck bumper hitch assy. Check ETRAILER for additional info...



When installed the plunger KEY will be pulled out of the switch assy if the trailer becomes disconnected which will apply full BRAKE DC VOLTAGE to the trailer electric brakes and hopefully will stop your run-away trailer.

Each Electric Brake magnet will draw 3AMPS DC CURRENT with 12VDC Applied so this will run down down your trailer battery rather quick when the plunger key is pulled...

Roy Ken
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Old 05-01-2015, 01:03 PM   #9
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Hey, people, lighten up. Making fun of posters' questions isn't cool.
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Old 05-01-2015, 04:52 PM   #10
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If you don't want to get a full size battery you can get just a break-away battery for under $50, this what I use on my car hauler. As stated it's the law and a really good idea to boot. Years ago I had a trailer break loose on the highway, luckily the chains held and damage was limited to the TV. If it had brakes with a battery there would have been no damage.

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