Check for a bad ground
It has been my experience that when the blinker comes on but the lights don't blink there is one or more bulbs burned out. If that is not the case check the flasher.
Check all of your blinker lights. There are two in each tail light, one in each center signal, and one at the corner of each headlight, a total of 8 lights should blink when you have the flashers on. If a bulb is burnt out, it will increase the blink rate. Also, installing LED's in the tail lights will cause the blink rate to increase.
turn signal relay is bad
When your 4X4 dash lights blink that is indicating a malfunction - could be just a sensor
change the bulb
If both sides (right and left) don't blink on and off, the blinker "can" may be the culprit.
If the lights blink fast on either side of the car then this means you either have non-factory bulbs in the car or you need to replace your blinkers because one of your lights is out.
blinker are you serious? BLINK !
The bulb may be blown or weak,also check the flasher.
If they turn on but don't blink, you probably need to replace the signal flasher relay.
Hitch the trailer. Connect the lights. Start your car or truck. Turn the turn signal on. Get out and go behind the trailer. See if they blink. Repeat for the other side.
Wow ... I'll assume you mean your blinker lights don't blink. Most likely your bulb is burned out.