96 volkswagen wont start

ok so car sat unstarted for about 2 months because it needed a new master cyclinder and brake booster, with the battery disconnected. put new parts on reconnected the battery went to start it and got nothing. all my lights come on and everything but i don't even get a click when i turn the key. i changed the battery, starter and ignition switch and still get nothing not even a click. car will catch in gear and runs fine. after i put the new parts on and reconnected the battery it was making sounds like the four ways were on but the lights werent flashing unless i turned the head lights on. i found a black box under the dash that was making the noise and disconnected it i still have all lights turn signals four ways and dash lights but car wont start. has to be electrical. im pulling my hair out please help