Toubleshooting Non-Functioning Lippert 3500-lb Tongue Jack
Question:
Hi jack will not work fuse is good replaced the switch no power but the light works. battery is good can you take it a part to check motor and circuit breaker? thanks
asked by: Ed M
Expert Reply:
Based on your description of the problem it sounds like either your jack has a bad ground connection or that the battery is not charged up quite fully enough to operate the jack motor.
If the jack's ground connection is made by its mounting plate, as is often the case with an a-frame tongue jack like # EJ-3520-BBX, you can try sanding/cleaning the mating jack and trailer surfaces to remove paint, primer, rust or trapped dirt that could interfere with the ground connection. Ideally you will have bare metal to bare metal with a light application of dielectric grease # 11755 to protect those bare metal surfaces from future corrosion.
The lights on jacks are usually high-efficiency LED types or small low-power incandescent bulbs that will illuminate with very little power. Just because a jack's LED lights operate this does not necessarily mean the battery is charged enough to operate the motor, which will pull many amps from the battery when asked to lift the trailer's weight.
A battery charger like # CTEK56353 can keep a trailer-mounted battery topped-up so it will have the power you need.
If you can remove the jack cover to get access to the motor power terminals you can try directly applying power to the motor, bypassing the trailer wiring and jack power switch. If the motor works this way then you know you have either a ground issue or bad wiring.
Products Referenced in This Question
Dielectric Grease for Electrical Connectors, 2 oz.
- Accessories and Parts
- Trailer Wiring
- Wiring
- Dielectric Grease
- LubriMatic
more information >
CTEK MULTI US 7002 12-Volt Universal Battery Charger w/ Pulse Maintenance and Backup Power
- Battery Charger
- Battery Charger
- Car/Truck/SUV
- Motorcycle
- Trailer
- Lawn Mower
- Jet Ski
- 150 Ah
- Charges/Maintains
- 12V
- Wall Outlet to Vehicle Battery
- CTEK Power Inc
more information >
Electric Jack w/ Footplate - A-Frame - 25-1/8" Lift - 3.5K - Black
- Camper Jacks
- Pop Up Camper
- Teardrop Camper
- Travel Trailer
- A-Frame Jack
- Leveling Jacks
- Tongue Jack
- Steel
- 3001 - 4000 lbs
- Electric Jack
- 18 Inch Lift
- Bolt-On
- 1 Jack
- etrailer
more information >
Product Page this Question was Asked From
Lippert Electric Trailer Jack with Footplate - A-Frame - 18" Lift - 3,500 lbs - Black
- Camper Jacks
- Pop Up Camper
- Teardrop Camper
- Travel Trailer
- A-Frame Jack
- Leveling Jacks
- Tongue Jack
- Steel
- 3001 - 4000 lbs
- Electric Jack
- Bolt-On
- 1 Jack
- Lippert
more information >
Featured Help Information
Instructions
Continue Researching
- Q&A: Weight Distribution Recommendation for a 2024 Jayco Flight 284BHS
- Q&A: Replacement 3500-lb Electric Tongue Jack for Lippert 1817941
- Q&A: Lowest-Profile A-Frame Trailer Jack For Tailgate Clearance
- Q&A: Hitch Extender For 2-1/2 Inch Hitch For Weight Distribution
- Q&A: Replacement For A-Frame Tongue Jack on Lippert Electric Ground Control TT
- Article: RV Pre-Departure Checklist
- Q&A: Replacement Toggle Switch For Lippert Power Stance Trailer Jack
- Article: Trailer Wiring Diagrams
- Q&A: Correct Replacement for an Atwood Water Heater GC6AA-9E
- Article: Trailer Jacks
- Article: How (and Where) to Connect an RV Propane Grill
- Article: Most Popular Wheel Bearings
- Article: What are the Common Types of Propane Fittings Used on RVs?
- Article: How to Measure for Trailer Hitch Drop