Troubleshooting a Trailer Electric Jack That Will Not When the Switch is Engaged

Question

Question:

The lift jack is for a 21 ft travel trailer. While getting ready to leave I put the toggle button in the up position, as I plugged in the electric to the hitch. The stand went up into the compartment and stopped on its own. I did not check the button after that, I had assumed all was ok. We I got to my new location to set up, the toggle button would not move at. It's frozen in the same position. I did figure out how to manually drop down the support leg to unhook my truck. How do I fix this?

asked by: Dawn

1

Helpful Expert Reply:

There could be a few things that could be causing your electric trailer jack to malfunction. I will give a few starting points to begin to troubleshoot the problem.

On some electric jacks there may be an inline fuse on the power wire going from the battery or power source to the jack. Check to see if the fuse has blown. You can use a tester like # PTW2993 to test the fuse will it is still connected to the power wire. Also inspect the wiring between the battery and the jack for any damage. Look for loose, frayed or broken connections. If you have a fuse and it and the wiring checks out to be ok, then you should move on to the switch.

Before you begin to check the switch, make sure to disconnect the battery to reduce any risk of electrical shock. An easy test for the switch will be to disconnect the switch and hook it up to a 12-volt power source directly. If the jack starts to operate in one direction, then reverse the hook-up to see if the jack will operate in the other direction. If the jack continues to operate after switching the hook-up, then the problem will be with the switch.

However, if the jack motor does not begin to operate after bypassing the switch and all the components and connections have been check, then the electric motor in the jack most likely has malfunctioned. Again, depending on the brand of jack, there may be a replacement motor available, but in some cases the whole jack will have to be replaced.

If by chance you need to replace your whole jack assembly, I have attached a link that lists all the electric A-frame jacks that we carry for you to review. If have any questions on the new jacks or more troubleshooting issues, please feel free to contact us back.

expert reply by: Jared P

1

Answer 1

Yes, I have attached the wiring diagram of the Replacement Electric Jack Switch with Harness #LC387874 for you to reference. Basically the Blue wire goes to a 6A auto reset breaker, like part #LC134181, which then goes to the positive circuit for…

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Answer 2

Since it won't retract you'll need to replace the switch with Replacement Extend/Retract Switch for Lippert Electric Trailer Jack #LC49MD.

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Answer 3

There was indeed a recall on the Lippert Smart Jack Electric Trailer Jack part #LC643589. It sounds like you have a pre-recall version but in order to confirm you can look on the back of the jack for a sticker on the stem with a serial number. If…

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Answer 4

The Replacement Extend/Retract Switch for Lippert Electric Trailer Jack #LC49MD is the correct switch for the Lippert Electric Trailer Jack with Footplate #LC285318 which does use 30 amps. Yes, the boot around the switch does seal the switch when…

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Answer 5

I checked with Lippert, the manufacturer, and the Replacement Tongue Jack for Lippert Ground Control TT Leveling System #LC421366 does not have replacement gears available. So if the gears are stripped and not working, that does mean you would need…

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Answer 6

For your electric jack, there are only three possible explanations for your jack not working with a charged battery. Either power is not getting to your motor, your motor is bad, or your ground connection isn't working properly. To test power,…

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Answer 7

In order to determine the torque rating for the lug nuts on your trailer you will need to know check out the chart I attached that shows all of the torque specs for all the trailer lugs available based on stud size, wheel material and wheel size.

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Answer 8

For sag from towing a trailer the best recommendation I can make is actually a weight distribution system. Suspension enhancement will help level your truck while towing. But the advantage to a weight distribution system is that it levels the vehicle…

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Answer 9

You will have to go with a sliding hitch to allow the trailer to make tight turns. For a trailer 8 feet wide the only bed length that's going to allow 90 degree turns without a slider is a stationary hitch. That being said you have two options.…

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Answer 10

The difference between the Class II and Class III hitches has to do with their Gross Trailer Weight (GTW), their Tongue Weight (TW), and their Hitch Receiver Size. Class II trailer hitch receivers have a 1-1/4 inch receiver and can be rated up to…

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Answer 11

A 4-Way trailer connector has the basic lighting functions only; running lights, left turn signal and brake lights, right turn signal and brake lights, and ground. A 7-Way has these functions and a 12 volt circuit, a circuit for electric trailer…

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Answer 12

Lance does have a proprietary plug, but many customers see a standard 6-way or 7-way round and notice it doesn't fit their factory 7-way as well. I've attached an article to help if you have one of the 7-way or 6-way round connectors which we…

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Troubleshooting a Trailer Electric Jack That Will Not When the Switch is Engaged

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