It looks like you will need to call service.
One thing to try is to plug in the BB when the car is idling to make sure you have enough power. Next set the sensitivity to 8 (all LEDs lit). Then press the test button and see if it extends.
Tom and Katharine
'07 Winnebago Tour 40TD, 400hp Cummins
RVing for 19 years & 150,000+ miles