First check all your bulbs and fuses including the hazard lights. If these are OK check the flasher relays for the signals and the hazards. These are usually cheap enough parts to replace as a starting point.
SOURCE: Turn signal isn't working.
More than likely you need to replace your turn signal relay located on the fuse panel.
SOURCE: 1999 nissan sentra gxe headlight problem
do you have the right light bulb? i own a 98 sentre and
it takes a 9004 bulb, but walmarts computer said to use 9007. That made the high beam censor stay on till i replaced it. if you look at the bulb you can tell if it is a dual or single beam bulb.!!!!
SOURCE: Driver side signals only work when headlights are OFF
What may have happened is either the headlights wiring or the parking lights wiring somewhere along the wiring fused to the left turn signals wiring. Depending on if the turn signals go on when you put the parking lights on or the headlights on.
If the signals come on when you turn on the headlights than you only need to locate the light green wire that comes off the left turn signal harness.
Next follow that wire the entire way back to the firewall looking for another wire fused to that wire as you go.
If there are no signs of this you need to continue looking on the other side of the firewall all the way back to the turn signal and hazard flasher unit which is a black box that connects to a black harness located next to a grey harness behind the knee bolster.
But if the signals come on when you turn on the parking lights than you will also need to check the wiring from the rear left signal and follow that light green wire all the way back to the turn signal and hazard flasher unit.
This should fix your problem, but if not than your problem may lay within the the wiring between the turn signal/hazard switches and the turn signal and hazard flasher unit.
Also you may have a burnt circuit in the junction block. This block is where the light green from the rear left signal and front left signal meet. Don't have a description but if you cannot find it let me know and I will go out to the yard and look myself and let you know.
SOURCE: 2004 audi A6 flasher lights
You need a new hazard light switch - the relay for the hazards and turn signals is built in. It's $40 or so at a dealership to buy a new one.
SOURCE: Hazards stuck, dash is dark when headlights on
I had a similar problem with my 2002 Taurus. I removed the dash and pulled out the display behind the steering wheel. I reseated all the light bulbs behind the display. Everything has worked fine since. You will find more info on how to do this if you search the internet.
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