Did you replace the battery within 2 years???
More misinformation...
A low battery will effect the Gauge Control Module and could cause the inability of one or more gauges to properly "check in" (aka, get assigned an address so the GCM can communicate with the gauge throughout that start session.) When this occurs, one or more gauges will remain lifeless throughout an entire run session since the GCM neve attempts to re-establish communication. Typically, if you turn off the car and then re-start, there's enough voltage to get the GCM to do its job properly and operation of the gauges is restored. If this symptom occasionally occurs with your GT, the most common cause is a battery that is under-performing and needs to be replaced. In our experience, typical good service life of the correct Group 24 Optima battery is at least 5 years when it is sitting on a tender.
The problem described above is independent of an actual gauge failure. When a gauge failure occurs, it sometimes starts out as a "sticky" needle that gets progressively worse and then it eventually fails.
If you experience an inoperative gauge, try turning off the car and re-starting. If the gauge starts to work again, you should think about replacing your battery. If after several start cycles the SAME gauge continues to be inoperative, then it is most likely the gauge that has failed. You should NEVER purchase the smaller gauges through Ford as you will just receive another "Version 1" gauge that is prone to failure. Instead, these gauges should be purchased from AutoMeter directly. To the best of my knowledge, a "Version 2" gauge has never failed. As for replacing the Speedo or Tach, the only "new" choice is directly from Ford. Some of you know that we used to offer a repair service for these gauges but the issue was that the (well known) vendor providing the internal parts was way too unreliable/unresponsive/disinterested when it came to supporting their parts so we stopped this service. There's no joy for anyone when the gauge panel needs to be removed multiple times to repair failed parts.
Note: The circular-shaped PLASTIC piece that serves as the hood for the gauge cluster (and which can be easily scratched when removing the gauge panel) now lists for more than $3200. I think it is the most $/lb part that I am aware of on the GT.
www.fordgtforum.com
