In nearly every case the actual turn signal wires run from the bulbs in the turn-signal housings directly to the hazard switch. This is done to allow the hazard system access to the turn signal bulbs without having to run an additional set of wires out to each bulb just for the hazard system. To make this design work the primary turn signal system feeds the outputs it wants to send to the bulbs, located out in the turn signal housings, into the hazard switch itself. So the hazard switch is actually a multi-pole double throw switch that connects the actual turn signal wires from the bulbs to either the hazard circuit or to the turn signal circuit depending on the position of the switch control button/knob. So if you cannot operate the hazard switch because the knob broke off then it is likely stuck in hazard mode or somewhere in between and it cannot connect the bulbs wires to the turn signal system while in this state.
the hazard and turn signal are both in the same relay
Try replacing the turn signal flasher
Assuming you have checked all of the bulbs, sockets and wiring, the signal flasher could be weak or the signal switch is bad.
Because the hazard/turn signal relay has failed. A defective/intermittent turn signal switch can also cause this symptom.
Try checking the turn signal flasher. Not to be confused with the hazard flasher.
Change the turn signal flasher relay.
Check to see if any of your front or back turn signal bulbs are not working. It's either a bad bulb or the turn signal/ hazard flasher relay in your fuse box.
It needs checked out but both the hazard and brake lights go through the turn signal switch.
Probably the turn signal/hazard flasher went bad. On some vehicles they are separate units, but on some vehicles they are the same unit.
the turn signal flasher may be the problem moast vehickles have one forturn &one for 4way
It is most likely the Hazard Switch. The turn signal and the hazard flasher are the same unit and will affect the operation of both. If the turn signals work, then it is more likely to be the hazard switch which is about $30 part.