changed heater core... blinkers don't work!

I changed my heater core about a month ago, and drive it so rarely at the moment that I just noticed my blinkers don't work anymore. I looked at some wiring diagrams but wasn't able to decipher exactly where I should be looking.

Does anybody know approximately what I may have disconnected/not reconnected that would cause them to stop working? I plugged everything back in to the steering column. When I pulled the glove box off, I found a relay stashed up in there, a square shaped one that looked aftermarket.. 2 wires weren't connected to anything.. subsequently I removed it. Is it possible this was related to the blinkers? Any help = greatly appreciated.

Success!!

After hours and hours of tracing wires, checking voltages, replacing relays, etc, I found that when I removed the dash to replace the heater core, the lt. blue wire going from the turn signal relay to the multifunction switch became unplugged from the multifunction switch entirely. I was unable to find the other end of lt. blue wire under the dash, so I rewired it and plugged it in to the open slot in the multifunction switch wiring harness, and now the blinkers work again.