Hi guys, I hope somebody can help me, I had a black box from Ingenie fitted yesterday and when I started up my car, some electrics weren't working and neither was my speedo. I had my headlights on but the backlight behind my speedo and revs was not working. I tried going for a little drive and reached at least 20mph but my speedo still read 0. Has anybody had this problem before or should I check for the problem myself? Thanks guys, Ben