2003 Volkswagen Passat Q&A
2003 Volkswagen Passat Question: emergency flashers
The turn signal and four way flasher unit is integrated into the hazard warning light switch, they frequently fail on other VWs (not sure about the Passat) and are inexpensive. - patrick mannion
Erratic turn signal operation can be a result of a failing turn signal flasher relay which will require replacement.
driving they go off touch brakes it stops but let off brakes starts again (fuse?)