08 Ranger| Problems with my instrument cluster

Hey guys, I am experiencing some problems with my instrument cluster on my 2008 Ford Ranger 2.3L. I was wondering if anyone has any ideas of what might be the solution or what I should look for.

The instrument cluster turns on and off intermittently. When I put the key in the "on" position, all of the gauges work as they should: fuel, engine temperature, check engine, etc. When I start the engine, all of the gauges work as they are supposed to for a few seconds and then it goes out. When I turn on the headlights, the backlight on the instrument cluster is working regardless if the gauges are working or not. During the ride, the instrument cluster gauges (speed, RPM, fuel, engine, temperature etc) will turn on and off without me doing anything specific. When the gauge cluster is not working, there are not any noises associated, such as seatbelt, open door, parking brake on. When the gauge cluster is working, everything works perfectly.

The car has an after-market radio, which works without any problems. I unplugged it, but the problem with the gauge cluster persisted. I replaced the fuse for the instrument cluster, but it was not the problem. The battery voltage when the car is off is 12.7 and 14.3 when on. I disconnected the battery for an hour, but the problem still occurred after reconnecting it. Any ideas or suggestions?