[dmjlambert]

You may have a short. The first thing I would do is remove the connector to the instrument cluster and see if the fuse blows with it disconnected. If it does not blow the fuse any more, the problem may be in the instrument cluster. If the fuse blows even with the cluster connector removed, the problem is not in the cluster.

If you find it is the instrument cluster, remove the cluster and visually inspect it carefully, you can also test the traces with an ohm meter to check for shorts to ground (bare metal of the instrument cluster). Removing the cluster is not too hard. You just unscrew the speedometer cable and oil gauge tube, putting a catch pan under the tube, and remove the screws holding the panel on, and remove the knobs and nuts that hold the panel on, then maneuver it around to remove it. Some people find they need to loosen and slightly lower the steering column, but on my truck I don't need to do that.

Post pictures and ask questions here to get some help.