So i just picked up my new truck today. A 94 ecsb 2wd. It has been sitting for 2 years before i bought it. It had a dead battery so we hooked jumper cables to it, and cranked it about 3 seconds and fired right up. I was surprised. lol. But as she fired up and for the first minute or 2, the speedo was acting as a tach. And i couldnt figure it out. I checked the fuses, and couldnt find any that were blown. None of the gauges were working except the Speedo. Which wasnt really working. lol. We took the jumper cables off, and it instantly died. So we figured the battery was junk. (which it was), we brought a battery just in case and put it in and it fired right up. Long story short, the battery died again because the alternator was bad. But my question is why are the gauges screwed up? They still dont work, and the "Check Gages" light is on, and flickering. so im guessing a bad cluster or ground? any help will be appreciated. thanks.