When you bolted it on did you make sure there was a bare metal connection between the tongue and the jack?
As sometimes happens paint, corrosion, rust, etc. may come between the hitch and the jack. If that happens then the circuit will not be complete and the jack will not operate.
I ran a separate wire to the negative terminal from the jack bolt. (because mine would not work due to rust on my prior trailer).
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2017 SLX 195RB
2021 Jeep Grand Cherokee Summit L 5.7L V8
Andersen WDH hitch, Renogy 100 AH Lithium &
200 Watts solar panels from Renogy
Prev. '14 Jeep Grand Cherokee Overland, gas 3.6 V6
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