My lights on my mazda don't work right. I had the driver headlight replaced and now when I use the signals the 4way flashers come on with them. when I turn the headlights on at night the break lights

Replace the multi- functioning switch. it operates the turn signals,4way flashers,wipers and headlights.those are very common problem

I don't believe it would be a bad ground for just one light. It could be a wire, a socket connector, or the bulb socket itself. See if the wire has power at the socket when signaling left, with key on. If there is power, probably a bad socket or connector. If no power, check for power coming from flasher-the wire going to front left, or driver's side. If you have power from the flasher, but nothing at the socket, the wire has probably broken.
Good luck.

Hi Shannon, befor you dive in and replace the indicator switch I would suggest you check the flasher unit. To replace the indicator switch you will need to remove the steering wheel (this usually means using a puller) Don't forget to punch match marks on the steering wheel and the column which must be aligned when assembling. Remove the steering wheel center cover. then the covers on the steering column Removed the screws (usually four) holding the stalk switch. don't forget to disconnect the battery and the wiring connection to the stalk switch. After replacing the assembly is opposite.to dismantling. Regards John

Replace the turn signal flasher.

YOUR CAR USES A ELECTRONIC TURN SIGNAL FLASHER .IT CONTROLS THE 4WAY AND TURN SIGNALS SOUNDS LIKE THE FLASHER CONTACTS ARE BURNED FAST .REPLACE THE FLASHER UNIT.

did u change the correct flasher?there are 2 flashers,the regular turn signal one and the 4way flashers,make sure u changed the right one,,,

if 4way flashers work & no signal,,,i would replace signal flasher,,,there are two flashers ,,,,

have u repaced the turn switch they have had a lot or problems in the past if it is the harness usually the problems in the steering column

Yes...Whatever you want to call them, there are two flasher units. Depending upon year, the 4way is usually on the fuse panel, the turn flasher may also be there, or up under dash on driver side, or, on newer vehicles there is a combination flasher module usually located on the right side under dash near the steering column.

Conrad, up north.
My protege is a '99. The turn signals and hazard flashers use the same flasher unit. It is located under the dash to the left of the steering wheel and above and a bit to the right right of the driver's side fuse box.