brake lights and tach. not working

im looking into buying a 91 stealth tt. but the brake lights and tach are not working. could these be an easy fix? are they a related issue? any info would be great. thanks

Brake lights and tach not working are going to be two seperate issues.

k, thanks stealthee. i was just wondering. i know i can fix the light problem but i was just kinda worried about the tach issue. not that i really need the tach but it would be nice if i could get it working lol