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02-27-2019, 12:26 PM
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#1
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Junior Member
Join Date: Oct 2018
Location: Ladson
Posts: 29
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Electric Tongue Jack Wiring
This is possibly a stupid question, but hey that's what this forum is for.
I have been removing my battery, since I don't have a disconnect, but have been thinking of getting an electric tongue jack. If I pull out the battery, but still have the jack wired into the positive side of the cable, will I have power when I plug the trailer into my truck? I know the obvious line of just get a battery disconnect is there, but I honestly have no idea where to put one. The battery box they gave me with the trailer fits the battery and nothing else. I don't want the terminals getting wet so it's got to be inside something but can't find any way to do it without getting a box too. Just trying to find ways to make it all work with what I have but if I've got to get a new box to install the disconnect then I'll do it.
Thanks in advance.
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02-27-2019, 01:01 PM
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#2
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Site Team
Join Date: Jul 2014
Location: Modesto
Posts: 20,237
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Couple of options. You can mount a disconnect to the inside of the frame, and if there is room put it under the front cap.
Your other option to have power to a tongue jack without a battery is to find the 12V charge line at the junction box of the umbilical cord and tie in there.
__________________
2012 Copper Canyon 273FWRET being towed by a 1994 Ford F350 CC,LB,Dually diesel.
Airlift 5000 bags, Prodigy brake control, 5 gauges on the pillar.Used to tow a '97 Jayco 323RKS.
Now an RVIA registered tech. Retired from Law enforcement in 2008 after 25+ yrs.
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02-27-2019, 01:44 PM
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#3
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Site Team
Join Date: Mar 2011
Location: Gaylord
Posts: 26,846
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Remember that if you connect "AND TOW" your trailer without a battery installed on the tongue, you have no emergency braking capability if the trailer should disconnect from the tow vehicle. Obtaining power via the 7 pin connector to power the jack and to power a few lights is possible, but if you get "out on the road," unless you have a battery installed in the trailer circuitry, your trailer, if it should disconnect from the tow vehicle will have no emergency break-away capability as there would be no DC power available to the trailer brakes once the umbilical pulls out of the tow vehicle socket.
__________________
John
2015 F250 6.7l 4x4
2014 Cougar X Lite 27RKS
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02-27-2019, 02:24 PM
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#4
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Senior Member
Join Date: Oct 2018
Location: Sacramento
Posts: 1,005
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Another thing to consider is whether the charge cable via the tow vehicle is heavy enough to take the current load imposed by the tongue jack. That motor is going to strain pretty hard when lifting the trailer.
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2022 Cedar Creek Champagne 38EL - "Big Bertha"
2019 GMC Sierra 3500 Denali HD 6.6L Duramax TD, CC, 4WD, DRW - "Mr. Beefy"
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02-27-2019, 02:36 PM
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#5
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Senior Member
Join Date: Oct 2017
Location: Brisbane Australia
Posts: 708
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Quote:
Originally Posted by MarkEHansen
Another thing to consider is whether the charge cable via the tow vehicle is heavy enough to take the current load imposed by the tongue jack. That motor is going to strain pretty hard when lifting the trailer.
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This is especially true if you have a WDH installed where you have to lift the whole rig to remove the weight bars, as with my Husky hitch. When I'm hooking up or unhooking, the tongue jack has to lift the back of the truck as well as the front of the trailer. It works pretty hard and I'm sure, draws bucketloads of current.
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02-27-2019, 08:30 PM
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#6
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Senior Member
Join Date: Jul 2017
Location: Muskegon
Posts: 356
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Take a look at this page for battery mounted shutoffs
https://www.google.com/search?q=batt...FgLxQqK8fsB7M:
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05 32' Montana Mountaineer 5th wheel 2 slides
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34' car trailer w/63" semi sleeper on the front
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02-28-2019, 04:57 AM
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#7
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Junior Member
Join Date: Oct 2018
Location: Ladson
Posts: 29
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I did not know about the battery being necessary for the e-brake. I have to store my camper away from my house and go get it when we want to use it. I will definitely be looking into a switch and however I might need to make that happen. Thanks.
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02-28-2019, 07:58 AM
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#8
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Senior Member
Join Date: Oct 2018
Location: Southern California
Posts: 1,286
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On one camping trip my RV battery died and I could not operate the power tongue jack. I plugged the trailer into my truck, which has 2 batteries, and the jack would not operate. I had to get out my generator and plug the trailer into it in order to operate the tongue jack.
__________________
Mike
2017 F250 6.7 Powerstroke FX4 crew cab
2016 Hideout 24BHSWE (27 foot TT)
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