You di dnot mention the kind of car. Most cars have a turn signal flasher and an emergency flasher.Are you sure that you replaced the right one?
Some cars have two flashers, one for the signals and the other for the emergency flashers. Be sure you replaced the right one. Also check the fuse the bulbs and lastly the signal switch.
You may want to check the thermal flasher.
The signal light circuit is separate from the emergency flashers. First check for a blown fuse, then check the signal flasher relay.
I just had the same problem and found that my rear turn light bulb went out and the turn signals no longer worked. Check any of the turning bulbs. You may have replaced the hazerd light flasher. There are two flashers, the turn signal one is near the hazerd one under the dash.
For most vehicles the hazards and signals are two separate circuits, they have separate fuses and separate flashers. Check your signal light fuse and signal light flasher.
Double check the wiring diagrams for your vehicle but it's probable the flashers and signals use the same relay to function. The wiring for your flashers will go through the hazard switch which is where the malfunction is. If you replace the switch your problem should be solved.
Check the fuses first of all. I think the Durango has two flashers as well, one for the hazards and one for the signals so it could be a bad flasher.
a bulb is bad and must be replaced
Check the flasher for the turn signals which is under the dash on the left side of the steering column . It is different from the emergency flasher.
Check fuse Check bulbs--they are double filamented with the smaller for turn signals Replace turn signal flasher--Most common problem
First check the flashers fuse .Then replace the flasher with a good one. There might be two-one for turn signals and one for 4ways. Or they could be one.
check the flasher itself and the switch