Truck came in to shop with travel but no lift function with 0% on the handle display. Tested batteries found 2 weak batteries and 2 marginal. Batteries were over 4 yrs old so replaced with 4 new. After battery install display still read 0%. Plugged in to charger and let run for full cycle. Checked voltage and load tested each battery 99-100% and +/- 6.33 volts each battery. Plugged in to truck and display read 100% and everything functioned. Cycled key and display read 0% with battery light flashing and travel but no lift function. With multiple key cycles handle will alternate between 0% and 100%. No codes showing and have tried swapping many parts from known working jack. Issue stays with the truck.
Any thoughts or idea would be greatly appreciated.
Thanks