93 RM brake lights

My brake lights weren't working on my 93 RM wagon, and I noticed the fuse was blown. Changed the fues, they worked. Later that day, I noticed they were out again, fuse blown. A short time later, the instrument cluster went lights out & dead, but came back on again. The brake lights are still out. Anyone have this problem? Any suggestions?

Got it figured out awhile ago. The lights in the upper brake light had been replaced with ones that were way too large. It melted the plastic & was shorting between the bulb & the metal underneath.