I have the same problem with my LE the fuel and temp will not work and when I hook up the tach it goes all the way into red. Now I can tell you this. Take out the fuel gage and put a light tester on the green wire. The light should come on and then give a blinking effect or impulse. This means the stabilzer is working. Then check the volts on the green line about 12v? OK. Now you are where I am at everything checks out but does not work. You can also pull the wire at the gas tank sending unit and ground it and see what happens to your fuel gage. It should go to full