Check bulb May be shorted and backfeeding searching for ground
the hazards are above the light overdrive switch to open the headlights on the dash and the turn signal is on the left side of the steering column.
Flashing headlights can mean different things, often signaling a warning about a potential hazard or alerting you to a problem with your vehicle. It can also be a signal for you to dim your high beams if they are too bright. In some cases, law enforcement officers may use flashing headlights as a signal to pull over for a traffic stop.
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.
behind the hazard button, its built as complete assembly for Turn/hazard signal
bad fuse or hazard switch
the hazard and turn signal are both in the same relay
That can happen when there is a bad ground to one of the lights.
Turn signal bulbs and hazard bulbs are the same bulb. When the turn signal is turned on, the indicator light on the dash flashes in tune with the turn signal. When the hazard lights are turned on, an extra fuse which is live, powers the hazard flashers, even if the car is turned off.
The fuse for hazard and signal lights on the Nissan Serena is in the fuse box, bottom row. The flasher fuse for hazard and signal lights is located in the dash just to the left of the radio.
It's the turn signal indicator-located behind the hazard lights.You have to take it out and replace it.
The 2004 Ford Ranger pickup truck signal hazard flasher unit can be found beneath the drivers side dashboard. The signal hazard flasher unit will be above the brake pedal.
Spray WD-40 into the hazard switch. Push the button a few times. Repeat, if necessary. May or may not work, but worth a try.