How do i keep the fuse for my dashboard lights from blowing on my 1979 Chevy caprice?

"Blowing" FusesFind the defect in that circuit, and properly repairit. Fuses and Circuit Breakers are safety devices designed and installed in electrical circuits TO PROTECT the conductors [wires] from short circuits and overload conditions which can cause extreme overheating that can result in damage to the insulation and the conductors, and worse, the possibility of a FIRE which could destroy the vehicle. When a fuse, and replacement fuses blow [or Circuit Breakers tripping], especially if it happens repeatedly, is an indicator of an UNSAFE CONDITION in that circuit, usually a short. Do not install a larger fuse in a misguided attempt to correct the problem. To install a larger fuse would almost guarantee damage to the wiring and an electrical system fire. The proper "fix" is for a qualified technician, who knows what he/she is doing, to troubleshoot the circuit, find and identify the defect, and make proper repair [s], BEFORE replacing the fuse again [with the properly sized fuse].