if you have a voltmeter or 12v test light, check for voltage out of the white wire from the brake pedal switch when the pedal is depressed. If not, then check to see if 12v is coming in on the pink wire to the switch. If so, then adjust or replace the switch.
If there is 12v coming from the white wire with the brake pedal depressed, then trace that wire to the turn signal switch and check the connector. If good, remove the turn signal switch and see if there is there is something amiss, and consider replacing it.
Btw, the fuse that feeds the brake light switch also feeds the emergency flashers so if they work, then that fuse should be ok.
Download you car's wiring diagram at www.mymopar.com
