Battery gauge doesn't work only the 2 red dots in between the time light up. It was intermittent at first now it is all the time. i have interchanged the display and A5 card with another truck and have replace wiring harness's and checked continuity from diplay back to A5 card. Display still doesn't work. Any help would be appriciated. I have spoken to BT technical guy and he doesn't seem to know what it is either. So i am hoping someone on here has had the same problem.