Replace the flasher or blinker relay. Depending on vehicle it's under the dash, in the fusebox or somewhere close to it.
If the turn signal lights come on but will not flash you have a defective flasher relay. Replace the relay.
replace turn signal flasher, hazard flasher is separate
If the turn signal bulbs light but will not flash, the flasher relay is defective, replace it.
There are two flashers, one for the hazards and one for the signals.
My sons 93 royal 88 Oldsmobile right directional would not blink. We changed the bulb and it started to flash.. hope that helps
Flasher relay is more than likely defective.
check the fuse first!
I replace my flasher fuse.Now they light up but won't blink.
you need a new bulb in right front.
The 1990 VW Jetta turn signals will not work when the ground wire is broken or corroded. The turn signals may need the lightbulb's replaced.
Most likely a bad turn signal flasher or blown fuse
have you tryed all the fuses then check if the bulbs are good