Changed heater core,now signals not working.....

Changed out my heater core on my 87 Mustang GT and now I have no signals!!!THIS SUCKS!!!!Bad enough the core was a b#@*& to change,but now I have this frustrating electrical to deal with!!Yes,I have changed the flasher,multifunction switch,etc....where is the ground for it located???Thought maybe I pulled the ground loose when I dropped the column,but dont know.They worked ok when I started.....AAAAAAAAHHHHHHHHHH!!!!!!!!!!!!Anyone have any ideas???Thank you if you do!!!!

Welcome to the forum. I think an electrical connector to your signals may have not been put back on. Backtrack your work. This is a stupid question , but I've got to ask it anyway. Is the fuse burned out? Do the indicators on the dash light up but don't flash or do you get no indicator at all? Check the relay. You shouldn't have to tear the dash out again to remedy the flashers. Everything should be within reach. If it is driving you nuts take it to an auto electrical shop. They should be able to fix it without costing an arm and a leg.