Question 1

Can this hook up directly to a Battery rather than using the 7 Pin adapter?

Accepted Answer

Yes you can.

The 7-pin plug that comes with this model tongue jack uses the Tow vehicle's electrical protection (typically a 20a or 30a fuse), and hence it is not built in to the jack design itself.

So Yes you can connect to your trailer battery, but you'll need to install a home made pig tail wired into the trailer battery. It will consist of 1: 7-pin female receptacle 2: a 30a fuse on the 12v+ side for electrical protection. This would allow you to use either the tow vehicle or the trailer battery. This is the option I prefer.

Here's links to the parts you'll need :

Female 7 pin trailer connector:
https://www.amazon.com/CURT-58150-Vehicle-Side-Trailer-Connector/dp/B001EP0G72/ref=sr_1_4?crid=HP2P878QP1E5&keywords=7+pin+female+trailer+connector&qid=1581199279&sprefix=7+pin+femal%2Caps%2C226&sr=8-4

inline fuse holder (and you'll need a 30a blade fuse to go in the fuse holder.):
https://www.amazon.com/Fastronix-Automotive-Marine-Weatherproof-Holder/dp/B01LWNVT61/ref=sr_1_6?keywords=inline+30a+fuse+waterproof&qid=1581201609&sr=8-6

You'll also want some 12 gauge wire and 10-12 Gauge Watertight Heat-Shrink Butt Connectors to build the pig tail.

Typically Black or Red wire is used on the 12v+ side and white wire is used in the 12v- going to the battery.

Here's a good video to watch to get an idea of how to install. (he says 10 guage wire but that is overkill - it's 14 gauge on the motor, so... that's why I say 12 gauge wire should be just fine)
(also he installed a switch in his junction box, which imo is unnecessary because there is already an up/down switch on the jack already.
https://www.youtube.com/watch?v=HCZ-4TGVSFQ

If you never want to use the tow vehicle to raise/lower... they sell a less expensive model which is designed to power through the trailer battery. These models typically come with a 30a inline fuse, and/or a 30a resettable breaker (possibly both). These models often come with only 1 wire for the 12v+ and uses the trailers frame for the ground connection.

The models that come with the 7 pin plugs to use the Tow vehicle have 2 wires. The 12v+ wire is typically connected to pin# 3 (tow vehicle's running lights - requires lights on in order for jack to work - often only has 20a fuse, which is not enough imo). It could also be connected to pin #4 (which is the AUX 12v+ charging circuit. I'm not sure what the fuse protection is on that... hopefully it's 30a). The ground (12v-) is usually on pin# 1.

Here's a link to the 7-pin trailer wiring schematic
https://i.pinimg.com/originals/fa/3b/f1/fa3bf1ae1f23192fd0d63b829905eb90.jpg

Hope this helps.

Question 2

Does the light have its own off on switch?

Accepted Answer

Yes there’s a button separate.

Question 3

my hand crank jack has 2 1/4" diameter shaft. Will this fit without modification?

Accepted Answer

Yes.  No problem

Question 4

What is the warranty for this product?

Accepted Answer

I think it’s a year. I bought one for Christmas and it quit working. Contacted the company and they sent someone to pickup my old one and is shipping a brand new one.

ASIN	B074KKR4SH
Automotive Fit Type	Universal Fit
Best Sellers Rank	#162,620 in Automotive ( See Top 100 in Automotive ) #359 in RV Jacks & Stabilizers
Brand Name	Uriah Products
Color	Black
Compatible with Vehicle Type	Trailer
Customer Reviews	4.2 4.2 out of 5 stars (3,230)
Global Trade Identification Number	00805089500119
Included Components	Uriah Products UC500010 Electric Trailer Jack (7-Way Connector, 5000 lb. 12V DC)
Item Type Name	Electric Trailer Jack (7-way connector, 5000 lb. 12V DC)
Item Weight	22.3 pounds
Load Capacity	5000 pounds
Manufacturer	Uriah Products
Manufacturer Part Number	UC500010
Manufacturer Warranty Description	See Manufacturers Website
Material Type	Metal
Maximum Lifting Height	31.5 inches
Minimum Height	4.5 inches
Model Number	UC500010
Number of Items	1
Style Name	Aluma-Tow UC500010 Electric Trailer Jack 5000 lbs., Electric Power Tongue Jack with 7-Way Connector 12V DC, Waterproof Cover & LED Light & Manual Crank Handle, 9"-31.5" for Lifting Trailers, Campers & RVs
UPC	805089500119
Unit Count	1 Count

Uriah Products Electric Trailer Jack with 7-Way Connector, 12V, 5000 Lbs Lift Capacity - Heavy-Duty Stabilizer for RV, Boat, Utility, and Off-Road Vehicles

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