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Old 11-14-2014, 10:46 AM   #1
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Will Trailer Lights Work Without Battery?

I am not near my TT to check for myself, but will the TT marker, brake, etc. lights work without a battery installed?
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Old 11-14-2014, 10:55 AM   #2
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Are you asking about TOWING without a battery installed?

If so, DO NOT do it.

BESIDES being illegal in every state to tow a trailer with electric brakes without a battery, the battery has to be there to power the camper's brake system if the camper became disconnected from the tow vehicle.

While the truck will provide power for the brakes and lights while connected, should your hitch disconnect; the camper will become an "unlit" unguided missile on the highway.

If the accident investigation team determines the camper was not being operated in accordance with state law and there are serious injuries or damage, you could be spending a LONG stretch in the "Pokie".
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Old 11-14-2014, 10:55 AM   #3
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Yes they will when plugged in your truck......
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Old 11-14-2014, 10:58 AM   #4
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If you're referring to the camper being plugged into the 7way...yes. Other 12V in the camper, lights, pump etc should work too as long as the 12V wire in the truck's 7 way is working.


Dave


Edit: Lou...good point about needing separate 12V power for the break-a-way switch!
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Old 11-14-2014, 12:33 PM   #5
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Thanks everyone. I didn't think about the break away system.
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Old 11-14-2014, 12:37 PM   #6
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Quote:
Originally Posted by Dave_Monica View Post
If you're referring to the camper being plugged into the 7way...yes. Other 12V in the camper, lights, pump etc should work too as long as the 12V wire in the truck's 7 way is working.


Dave


Edit: Lou...good point about needing separate 12V power for the break-a-way switch!

X2
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Old 11-14-2014, 12:43 PM   #7
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Quote:
Originally Posted by Herk7769 View Post
Are you asking about TOWING without a battery installed?

If so, DO NOT do it.

BESIDES being illegal in every state to tow a trailer with electric brakes without a battery, the battery has to be there to power the camper's brake system if the camper became disconnected from the tow vehicle.

While the truck will provide power for the brakes and lights while connected, should your hitch disconnect; the camper will become an "unlit" unguided missile on the highway.

If the accident investigation team determines the camper was not being operating in accordance with state law and there are serious injuries or damage, you could be spending a LONG stretch in the "Pokie".
Thanks Herk!
Good to know. I have pulled the batteries at the house for winter storage then towed the TT to the storage lot knowing the lights and brakes worked from the truck battery.
From now on I'll just bring the batteries back from the lot after winterizing.
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Old 11-14-2014, 12:49 PM   #8
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Thanks Herk!
Good to know. I have pulled the batteries at the house for winter storage then towed the TT to the storage lot knowing the lights and brakes worked from the truck battery.
From now on I'll just bring the batteries back from the lot after winterizing.
With out without a battery in you trailer has no effect on marker or running lights regardless.

The battery in your camper only works items in your camper and the breakaway switch.

TURBS.
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Old 11-14-2014, 01:00 PM   #9
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With out without a battery in you trailer has no effect on marker or running lights regardless.

The battery in your camper only works items in your camper and the breakaway switch.

TURBS.
Understood
The thing I didn't think about was what if it did break away. No Brakes on the camper. Safety chains and all considered it could still be quite a mess. Personally never had a trailer come off the hitch. But I have seen it (boats going to and from Lake Mead) and know it could happen. Just wanted to give a thank you for some info I had not considered.
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Old 11-14-2014, 01:25 PM   #10
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One other point... If you had to do this for some reason... be sure to insulate the battery wiring because voltage will be present there even without the battery...
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Old 11-15-2014, 03:21 PM   #11
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Interesting many transporter run sans battery. Dealers sell you the battery when they pdi the trailer.
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Old 11-15-2014, 03:51 PM   #12
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Interesting many transporter run sans battery. Dealers sell you the battery when they pdi the trailer.
Most don't care just as they do not care about breaking in the pads on your brake system. Welcome to safe highway system of the good old USA....
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Old 11-15-2014, 06:30 PM   #13
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Interesting many transporter run sans battery. Dealers sell you the battery when they pdi the trailer.
I am not so sure about this. No transport driver would risk his CDL over a 12 volt battery. Most likely they have one in they use during delivery to the dealership. Then the expensive house battery is installed.
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Old 11-16-2014, 01:12 PM   #14
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I am not so sure about this. No transport driver would risk his CDL over a 12 volt battery. Most likely they have one in they use during delivery to the dealership. Then the expensive house battery is installed.
Not to hijack this thread, but this is pertinent to the OP's question about towing a trailer sans the battery.

Lou is absolutely correct that the transporters do indeed provide the battery to the RV while towing, if needed.

Here is a link (with all the requirements) and an excerpt from a RV transport company on the electric requirements (in case anyone may be interested in doing it themselves):


RvTransport.com¬*-¬* Transport Info

"You need an electric brake controller suitable for towing a trailer with six brakes. You need a seven wire "Bargeman" (female side) RV style electrical connector in the truck bed for the fifth wheel units, and a connector near the ball mount for travel trailers. You must have 102" wide towing mirrors, and big sturdy mud flaps mounted to hang about four inches above the ground. An extra large fuel tank is good to have (maximum of 110 gallon, and must have six way electric valve) and a toolbox for your jack and other emergency items, like wheel changing tools. You will need a Standard Group 24 RV battery for the hydraulic jacks on some units and for the trailer break away switch.."

EDIT: another link from Camping Worlds transporters that basically states the same:

http://cwrvtransport.com/contractor/

" breakaway battery: DOT regulations require the battery to be a “wet” cell battery-not dry cell. It can be purchased in Elkhart at orientation."
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