i had a problem with a different vehicle and year but went through the whole thing all the wiring and relays and found that the switch was bad put a new one in and it worked just fine but that is were i would look
I would replace the turn signal switch.
Usually the fuse is going bad.
how to change front left turn signal bulb on a 2004 chevy express
You may have a "ground loop" problem on the left turn signal. Check the ground wire at the front and rear signal bulbs.
It looks like your left front one is burnt out. When there is not enough current flow the good light will not flash.
light is burned out
Normal cause is failed bulb.
flasher will not flash when circuit is open or shorted replace left front turn signal bulb
need to replace blinker bulb
The tun signal flasher on a 1998 Chevy Tracker is located in the dash on the driver's side. It is to the left above the brake pedal.
was jeep in accident and repaired? sounds like crossed or shorted wires
You have a failed bulb on the right side.