Shorts are generally not easy for vehicle owners to diagnose on their own, but a few things you could try to narrow it down. First and very easy would be to install a SLIGHTLY (5 amp) larger fuse. Replace the blown 10 amp fuse with a 15 amp fuse. IF the fault is in the instrument pack, that MAY fix it. If the power feed wire is shorted somewhere in the harness, it is still going to blow. DO NOT EXCEED THE 15 AMP FUSE. If that does not fix your fault, it may be beyond your abilities, but if you want to proceed. Locate the connector (At the instrument pack) that contains the power feed wire from the fuse box to the instrument pack. Locate the power feed wire in that connector. Cut that wire about 3 inches back from the connector. Run a TEMPORARY wire with a 10 amp fuse protecting it to the cut wire. Then simply drive the vehicle as you normally would and you can determine if the fault was in the harness (Fuse no longer blows) or if you have a defective instrument pack as electbc suggested in his post, should that fuse also blow. (Note) There are several short detectors on the market, but most require tracing the wiring harness along its routing which usually requires a lot of component removal. Good luck.