Wiring Instructions for the Tradesman Vaquero Hydraulic A-Frame Trailer Jack

Updated 10/30/2025 | Published 10/02/2025

Question:

Looking for install instructions. Mainly looking for wiring setup requirements. Current electric jack has a 7 way plug for power. I assume Ill need a battery setup for this.

asked by: Uriah J

Expert Reply:

Hey Uriah, thanks for reaching out!

The Tradesman Vaquero Self-Contained Hydraulic A-Frame Trailer Jack # ST86FR will work best if it's hardwired to a battery on your trailer, but you can also hardwire a 7-Way plug and lead like part # H20043 and just plug that into your truck socket when you need to operate the jack.

If you look at the motor head on you'll connect the 12V power wire to the terminal on the left, and the negative wire to the middle terminal (see attached photo).

What kind of trailer will you be using this on?

expert reply by: Jon G

Wiring Diagram for Tradesman Vaquero Hydraulic Jack
(click to enlarge)

Jon G.

10/30/2025

Hey Uriah, how did the wiring setup go with the hydraulic A-frame jack? Did you end up using the 7-way plug or wiring it straight to a trailer battery? Your update could make it easier for the next person working on the same setup.