Hooking up an electric trailer jack dramatically simplifies the process of connecting and disconnecting your trailer, saving you time and back strain. This article provides a step-by-step guide and crucial safety information to ensure a successful and safe installation and operation of your electric trailer jack.
Understanding the Basics: Choosing and Preparing
Before diving into the wiring, selecting the right electric trailer jack and ensuring your setup is ready is crucial. The jack’s lifting capacity should always exceed your trailer’s tongue weight.
Selecting the Right Electric Trailer Jack
Consider these factors when choosing your jack:
- Lifting Capacity: As mentioned, this is paramount. Know your trailer’s tongue weight (the downward force exerted by the trailer’s coupler on the hitch ball) and choose a jack that exceeds it by at least 25%.
- Travel Distance: This refers to the jack’s maximum lifting height. Measure the distance from the coupler to the ground at its lowest point when unhitched, then add several inches for adequate clearance when hooking up.
- Mounting Style: Electric trailer jacks come in various mounting styles, primarily A-frame and round tube. Ensure the mounting style matches your trailer frame.
- Power Source: Most electric jacks operate on a 12-volt DC system, drawing power from your trailer’s battery or tow vehicle.
- Features: Look for features like a built-in LED light for nighttime operation, a weatherproof housing, and a manual override in case of power failure.
Preparing for Installation
Before you begin, gather the necessary tools and materials:
- Electric trailer jack kit (containing the jack, mounting hardware, and wiring instructions)
- Wrench set
- Screwdriver set (Phillips and flathead)
- Wire stripper/cutter
- Electrical tape or heat shrink tubing
- Wire connectors (crimp connectors, butt connectors, or solder and heat shrink)
- Voltmeter or multimeter
- Safety glasses
- Gloves
- Battery terminal cleaner
- Marine-grade wire (if extending the existing wiring)
- Inline fuse holder and fuse (of appropriate amperage, typically 20-30 amps)
Carefully read the manufacturer’s instructions that come with your specific electric trailer jack. Instructions may vary slightly depending on the model.
The Installation Process: Step-by-Step
This section outlines the general steps for installing an electric trailer jack. Always prioritize safety and consult the manufacturer’s instructions for your specific jack model.
1. Removing the Old Jack (If Applicable)
If you are replacing an existing jack, safely support the trailer frame with jack stands. Disconnect any existing wiring from the old jack. Loosen and remove the mounting hardware securing the old jack to the trailer frame. Carefully lift the old jack away from the trailer.
2. Mounting the New Electric Trailer Jack
Position the new electric trailer jack onto the trailer frame, aligning it with the existing mounting holes (if available). If new mounting holes are required, consult the manufacturer’s instructions and use a drill to create them, ensuring they are properly sized and located for the provided hardware. Secure the jack to the frame using the provided mounting hardware. Ensure the jack is mounted securely and level.
3. Connecting the Wiring
This is the most critical step. Incorrect wiring can damage your jack or electrical system.
- Identifying the Wires: Typically, electric trailer jacks have two wires: a positive (red) wire and a negative (black) wire.
- Connecting to the Power Source: The positive wire needs to be connected to a 12-volt DC power source, either the trailer battery or the tow vehicle’s battery (through a wiring harness). The negative wire needs to be connected to a solid ground.
- Grounding: Connect the negative (black) wire to a clean, rust-free metal surface on the trailer frame. Use a ring terminal and secure it with a bolt.
- Positive Connection: Ideally, connect the positive (red) wire directly to the positive terminal of the trailer battery. If connecting to the tow vehicle’s battery, use a heavy-gauge wire (10 or 12 gauge) and run it through an inline fuse holder. The fuse protects the jack and your vehicle’s electrical system from overloads. Connect the fuse holder to the positive terminal of the battery.
- Using Wire Connectors: Use appropriate wire connectors to make secure and weatherproof connections. Crimp connectors, butt connectors, or solder and heat shrink are all viable options. Ensure the connections are tight and well-insulated.
- Testing the Connections: After making all connections, use a voltmeter to verify that you are getting 12 volts at the jack. Carefully test the jack by extending and retracting it a short distance.
4. Securing the Wiring
Neatly route and secure all wiring using zip ties or electrical tape. Avoid sharp edges or areas where the wires could be pinched or damaged. Ensure the wiring is protected from the elements.
5. Final Checks and Adjustments
- Double-check all connections to ensure they are secure and properly insulated.
- Verify that the jack extends and retracts smoothly without any binding or unusual noises.
- Lubricate the jack screw with grease as recommended by the manufacturer.
Frequently Asked Questions (FAQs)
Here are some frequently asked questions about hooking up electric trailer jacks:
FAQ 1: What gauge wire should I use to connect the electric jack to the battery?
Generally, a 10- or 12-gauge wire is recommended for electric trailer jacks. Check the jack’s manual for specific recommendations based on the jack’s amperage draw. Using too small a gauge wire can result in voltage drop and poor performance.
FAQ 2: Where should I mount the fuse for the electric jack?
The fuse should be mounted as close as possible to the battery or power source. This minimizes the length of unprotected wire in case of a short circuit. An inline fuse holder is the most common method.
FAQ 3: What size fuse do I need for my electric trailer jack?
The fuse size depends on the jack’s amperage draw. Check the manufacturer’s specifications. A 20- or 30-amp fuse is typical for most electric trailer jacks.
FAQ 4: My electric jack is not working. What could be the problem?
Possible causes include:
- Blown fuse: Check the fuse and replace it if necessary.
- Loose connection: Inspect all wiring connections for looseness or corrosion.
- Low battery voltage: Ensure the battery is fully charged.
- Faulty jack motor: The motor may be damaged and require replacement.
- Defective switch: The jack’s switch may be faulty.
FAQ 5: Can I wire the electric jack directly to my tow vehicle’s battery?
Yes, you can, but it’s highly recommended to use a properly installed wiring harness with a dedicated circuit for trailer accessories. This prevents overloading your vehicle’s electrical system. Ensure the wiring harness includes a fuse and relay for protection.
FAQ 6: How do I use the manual override on my electric jack?
The manual override is a crucial feature in case of power failure. Typically, it involves inserting a hand crank into a designated port on the jack and manually cranking it up or down. Consult your jack’s manual for the specific procedure. Always ensure the trailer is properly supported with jack stands before using the manual override.
FAQ 7: Is it necessary to use a marine-grade wire for wiring my electric trailer jack?
While not strictly required, marine-grade wire is highly recommended, especially if the wiring will be exposed to the elements. Marine-grade wire is more resistant to corrosion and moisture, ensuring a longer lifespan and more reliable performance.
FAQ 8: Can I extend the wires that came with my electric trailer jack?
Yes, you can, but use the same gauge wire or a larger gauge wire to avoid voltage drop. Use appropriate wire connectors and ensure the connections are weatherproof.
FAQ 9: How often should I lubricate my electric trailer jack?
Lubricate the jack screw with grease every 6 months or as recommended by the manufacturer. This keeps the jack operating smoothly and prevents corrosion.
FAQ 10: My electric jack seems slow. What could be the reason?
Possible reasons include:
- Low battery voltage: Ensure the battery is fully charged.
- Heavier-than-rated tongue weight: The jack may be struggling to lift the weight.
- Lack of lubrication: Lubricate the jack screw.
- Worn motor: The motor may be weakening.
FAQ 11: Can I use an electric trailer jack on any type of trailer?
Electric trailer jacks are generally suitable for most types of trailers with a tongue. However, verify that the jack’s lifting capacity and mounting style are compatible with your specific trailer.
FAQ 12: What safety precautions should I take when using an electric trailer jack?
- Always support the trailer frame with jack stands before working underneath it.
- Never exceed the jack’s lifting capacity.
- Avoid using the jack on uneven or unstable ground.
- Keep children and pets away from the jack while it is in operation.
- Regularly inspect the jack for signs of damage or wear.
By following these guidelines and prioritizing safety, you can successfully hook up your electric trailer jack and enjoy the convenience it offers. Remember to always consult the manufacturer’s instructions for your specific model. Happy towing!