You might have a loose connection in one of the plugs. I had a loose plug where it plugs into the circuit board in the front electrical compartment. Giving me problems off and on until I finally found it.
Try unplugging and plugging back in all the connections. If it still isn't working, you can always call Valid Power Gear. They are out of Vancouver, BC.
Bill & Brigitte
06 Windsor PEQ, Cummins 400 ISL
2014 Honda CRV