93 Chevy Lumina...The hazards flash when turned on as they are meant to in the front and back. When the turn signal is turned on (either left or right) only a green arrow shows solid for each direction. No light shows on outside for either turn signal. Is this a turn signal relay problem or does it need bulb replacement?

SOURCE: 96 chevy lumina sedan

for both issues, could possibly be the flasher unit for the blinkers.....which could be separate from the hazard flasher unit...(happened on my 92 chevy lumina) or the actual turn signal switch which is located in the steering column....not the stick you push, but the part inside that the lever controls (also happened on my lumina............3 times)

TIP:

start by checking the flasher....its cheap maybe 3-4$ for a new unit.....if thats not it and you figure out its the switch, go to a junkyard.....its wayyyy cheaper

SOURCE: electrical problem

Find the ground wire on one of the lights and add another ground wire to a good clean metal surface and see if that fixes the problem. It defently sounds like a ground problem at one of the lights.

SOURCE: 93 S10 left turn signals not working

Have you tried replacing the flasher? You'd think neither side would blink if the flasher was bad but I've seen this happen and it turned out to be the flasher. You could swap the signal flasher with the 4 way flasher to verify that's the problem before going out and buying one. Should be a few bucks at the parts store.

SOURCE: how to replace front turn signal bulb

its easy. when the sinal flashes fast its just telling you a light is out. there might be 2 ways to fix this. open the truck look for the housing for the lights. now you may have to just turn the harnest where the wires are. or you just nee a phillps screw driver and unscrew the plastic cover off.

SOURCE: 99 Chevy Tahoe... Rear turn signals, brake lights, and hazards

I had this problem, and to be honest, it happened to the left side about a week later...it's the board that the bulbs plug into...it's a very common problem with this model. So popular that you can normally get the socket board off the shelf at a parts store! it's extremely simple to replace, and I replaced all the bulbs at the same time!