After countless of hours trying to diagnose my problem with my instrument cluster on my 96 XJ. I've checked the fuses, made sure the grounds are OK, tried both another cluster and another PCM. I've also tried the trick where you make a new ground directly to the cluster without luck :/
I can say that when I turn the key to the run position, the temperature gauge and the oil pressure move slightly, but does not show the temperature and the pressure. They just stay in their "resting position". The voltmeter works and I suspect that the fuel gauge also work. The only gauges that don't move at all is the tachometer and the speedometer.
My english is probably not the best, but I hope you understand what I write
Thanks in advance