Hey all, new to this forum. I have a 1997 Ford F-150 XLT extended cab 4.6l Triton. I have just replaced my GEM recently apparently for no reason at all. Was hoping it'd solve my driver power window issue with it not rolling down. Anyways, my instrument cluster has gone wonky on me. The Oil Pressure, Coolant Temp, Battery Voltage, and Gas gauge have not been working correctly. I just put my old GEM back in today, and it still did the same thing. I have uploaded a video to youtube to show the problem. I am thinking it may be the cluster, or possibly an ECM? I know for a fact the water wasn't warm because the engine was off for a couple hours while replacing the GEM, my alternator is charging at 13.88 volts, and I have half a tank of gas. Tach and Speedometer work great As for the oil pressure, that's normally on the lower side of halfway between the markings. I think I am going to the junk yard tomorrow to pick up a cluster and give it a shot, if nothing else he will let me return it. Any thoughts and help will be greatly appreciated!!!

 

Hi, I'm having the same exact issue that I'm trying to diagnose. I was wondering if you ever found the cause and repair, if it wasn't the GEM. Thanks in advance!

 

Hmm could be a sending unit is at fault and about the power windows check the motor.