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Open Roads Forum  >  Travel Trailers  >  General Q&A

 > Jacking & moving without installing trailer battery

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Teoma

Southwest Virginia

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Posted: 09/08/19 01:59pm Link  |  Quote  |  Print  |  Notify Moderator

Hi, I have a couple of quick questions. I need to move my trailer a short distance in my yard. The trailer battery is out of the trailer and I am temporarily unable to physically reinstall it back into my trailer. I have a electric tongue jack and I want to use it to hook the trailer up to my truck. If I plug my 7 pin trailer cable into my truck hitch receptacle will I be able to operate the electric tongue jack without the trailer battery? In other words will the truck battery operate the trailer tongue jack? Will I cause any electrical damage to the trailer or truck if I do this? Thanks in advance.
Ambrose

rbpru

North Central Indiana

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Posted: 09/08/19 02:17pm Link  |  Quote  |  Print  |  Notify Moderator

Interesting question. It was my understanding the 12 volt line is fused and relay activated. But that is on my 2011 F-150.

Does your jack have a manual operating option?


Twenty six foot 2010 Dutchmen Lite pulled with a 2011 EcoBoost F-150 4x4.

Just right for Grandpa, Grandma and the dog.


USAFBILL

Alabama

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Posted: 09/08/19 02:23pm Link  |  Quote  |  Print  |  Notify Moderator

My understanding is you can't as the hot 12 volt leads from the 7 pin connector are all dedicated to brakes, and lights.

DutchmenSport

Indiana

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Posted: 09/08/19 02:31pm Link  |  Quote  |  Print  |  Notify Moderator

The electric jack on my previous travel trailer was wired into the battery terminal directly with it's own fuse. If there was no battery, the jack wire was just dangling in air. If this is the case with your's in question, then you could jump the jack easily with a pair of jumper cables, which would run only the jack.

Most electric jacks have a manual override. The rubber seal on the top pops off and then there is an end for a heavy duty Allen Wrench style jack to insert so it can manually be raised and lowered. At least mine did.

Check it out, either one of these methods will work to operate the tongue jack.

Boon Docker

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Posted: 09/08/19 02:31pm Link  |  Quote  |  Print  |  Notify Moderator

Use the truck battery and booster cables to connect to the trailer battery cables.

nickthehunter

Southgate, MI

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Posted: 09/08/19 02:36pm Link  |  Quote  |  Print  |  Notify Moderator

Try it and see, mine will work off the 7 Pin with no battery.

enblethen

Moses Lake, WA

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Posted: 09/08/19 02:45pm Link  |  Quote  |  Print  |  Notify Moderator

You should be able to use the trailer connector. Make sure you isolate the positive battery cable.
It may move slow!
Could use a battery pack to operate jack!


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midnightsadie

ohio

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Posted: 09/08/19 04:10pm Link  |  Quote  |  Print  |  Notify Moderator

how about doing it with a portable impact drill .there should be a square slot in the top of the jack for manual operation.

SoundGuy

S Ontario

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Posted: 09/08/19 04:51pm Link  |  Quote  |  Print  |  Notify Moderator

Teoma wrote:

If I plug my 7 pin trailer cable into my truck hitch receptacle will I be able to operate the electric tongue jack without the trailer battery?


Yes, as long as the charge line on the truck's 7-pin Bargman connector is active - i.e. Pin 4 is +12vdc, Pin 1 is ground. On GM trucks the charge line is always hot regardless of whether the ignition is on or not, on other brands the charge line may only be hot when the ignition is on.

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stevemorris

ontario

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Posted: 09/09/19 05:49am Link  |  Quote  |  Print  |  Notify Moderator

play it safe and use the manual override

i dont know how many amps a powerjack uses, but the wire in the tow vehicle to the 7 pin may not be big enough


2017 Ram 1500 4door, 4x4, 5.7 l hemi, 8 speed
2008 KZ Spree 260

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