This 70 cluster I've been working with has been spotty: the rally gauge has been iffy: it almost always notes an empty tank. The left turn seems to only work with the lights on. The dimmer's questionable. I figured these would all work themselves out when the new Letric harness was installed, the dash bulbs were replaced, a new tach has been installed, etc. And now this "freshened" one is still showing the same symptoms. Between dealing with all the garbage China Parts Place and OPGI parts, I've about reached my limit on frustration. Does anyone do any sort of wiring checking on dashes & all its components? I'm curious if someone does this as a service.