RAM EJ-3550-BBX Electric A-Frame Jack with Single Wire Hookup - 3.5K Capacity - Ideal for RVs and Trailers, Ensuring Easy and Efficient Setup

Seems to be a solid product not much for instructions on wiring.On the jack I received the blue wire is the hot + and black is the negative - the jack will raise and lower either way you hook it up but the led light will only work in my case blue to the positive and black to the negative. Hope this helps. I raised and lowered the jack 20 + times just make sure it held up. I did get a water proof cover.