this tells you that from the connector behind the drivers kick panel that it is good downstream from there & also downstream forward past the firewall to the front lights including grounds cuz 4 ways & brake lights use the same large filament(s) in the 1157 bulbs. The TS flasher works both sides so it is OK. seperate the dangling ts/brake harness under the st column & ohm the col half for a start. try the stalk up/down & check continuities. this'll tell us if that assy is the problem.