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Old 01-24-2015, 07:37 AM   #1
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Dead Electric Tongue Jack

Our new Work and Play 30WRS came equipped with a Ram 3500 electric jack. I raised the front of the trailer, while hitched to the TV, to minimize the angle of the door ramp for clearance while unloading the trike from the rear. I fully extended the jack. After unloading, I tried to lower the tongue, but the jack motor would not engage. I checked all the connections, the fuse panel, and the reset button, and all appeared OK. I ended up lowering the jack manually. Is this jack toast, or can it be repaired?
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Old 01-24-2015, 07:55 AM   #2
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I have no experience with this jack but if I were you-- I'd get a meter or test light
and make sure there is power going to the jack. Test as close to the jack as possible.
In other words find the wire that feeds the jack out on the tongue area and make
sure it has 12v actually getting to the jack.

I'm guessing you blew a fuse somewhere when you hit the stop at full up.
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Old 01-24-2015, 08:14 AM   #3
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My jack has a inline fuse could this be the problem?
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Old 01-24-2015, 09:49 AM   #4
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Usually there is an in-line fuse as per picture.....black fuse holder in red wire.
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Old 01-24-2015, 10:31 AM   #5
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I had my fuse blow twice for no apparent reason. Some had suggested water was getting inside the motor. I ordered a vinyl jack cover and a resettable 12v 40 amp circuit breaker from amazon.
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Old 01-24-2015, 12:50 PM   #6
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Probably the in line fuse have had to replace ours a couple of times .It was hard to find the first time. Our jack broke last trip last summer, we have to rebuild or replace it this spring main drive gear on motor
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Old 01-24-2015, 12:50 PM   #7
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Thank you all for your responses. I traced the wiring back and found a circuit breaker, which had been tripped. Reset, and problem solved!
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Old 01-24-2015, 01:12 PM   #8
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Don't extend or retract the jack to the limits as that may overload the motor and cause a fuse or circuit breaker to trip. There are no limit switches on nearly all the tongue jacks.
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Old 01-24-2015, 01:16 PM   #9
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It was explained to me that when the jack reaches it limits, it makes a chatter, then blows the circuit breaker. So It was suggested to buy an in line RESETABLE circuit breaker, mount near the jack. cost a dollar or two. Tired of replacing fuses
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Old 01-24-2015, 01:18 PM   #10
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Quote:
Originally Posted by Ricochet View Post
Thank you all for your responses. I traced the wiring back and found a circuit breaker, which had been tripped. Reset, and problem solved!
Thanks for replying with the answer to your problem!
Some electric motors blow fuses when they hit their hard-stop point. I had the condition with the front jacks on my 5th wheel until people here told me to get an automatic resetting breaker to stick in the fuse holder. Have had no problems since.

See this:
Quote:
Originally Posted by fonzie View Post
When the motor stalls, the current goes way up and will burn the fuse......called "LRA"

What is locked rotor current
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