check the turn signal flasher
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.
you dont
No. there is no relay for the turn signals.
where is the ground wire for the brake and turn signals on 2002 silverado chev pu. also do you have a copy of the wiring>
It has a flasher relay for the signals only.
the circuit boards on the taillights are bad.
IN LOWER PART OF FUSE BOX
If the turn signals and emergency signals don't workout sounds like an electrical problem's would suggest that you take it into the closest shop to get the problem diagnosed properly.
In all probability you have a bad ground.
Check bulb and socket Should be a double filament bulb--smaller for Stop and Turn larger for tail light
its either the flasher or the turn signal switch
check the brake light relay under the hood