A/F Guage Probs

[abstract_72]

I have had a Phantom A/F guage in my Spirit since I bought the car/. The previous owner had installed it and I have had no reason to mess with it until it just stopped working one day. The only reading on the guage is a yellow light in the Stoich area. The light just stays stuck right on the same light always. I pulled the guage out today and made sure the ground was directly to the battery and checked the connection at a the o2 harness, but the same thing... just one light and it never moves or even blinks or anything. The guage has power but it seems like there is no info being sent to it, even though it is hooked up the same way it was when it stopped working. Could something be wrong with the wiring to the o2 sensor or could my guage be messed up? I know my o2 is bad right now, but I thought the guage would read something, like before when my o2 was dead it jsut read full rich, but at least the guage moved a little...
LMK is anyone has any ideas or suggestions...
Thanks