[Fortran]

Hello, I am having difficulties with the left turn signal on my 1991 4.3 Astro RWD. It has about 150k miles. As I realize there is more than one potential cause for such as broad issue (turn signal not working), I will try to provide as many details as possible.

I first starting having issues about a month and a half ago. The left turn signal started having intermittent issues. It would have difficulties for about a day, then work without problems for several more, or even "fix" itself during a single commute.

Now, it appears to have finally ceased functioning all together. The right signal works fine (far as I am aware). However, when I turn the left signal on, the light on the dash goes on, but does not blink nor make any sound. Earlier today, I wanted to see how it look from the outside. Neither the rear nor front driver's side/left signals blink function. No blinking or anything. Furthermore, I tried my emergency flashers - the right rear turn signal blinked as it should, but not the left one.

I have to admit, I am not quite sure what the issue is. If it were a bulb, I do not see why both the front and rear signals would not work. I also thought (and I could most definitely be wrong on this), after doing some research online (not always the best source - I know!) that if the turn signal flasher were faulty, nothing would be working - no lights on the dash, no right signal, etc.

Thanks so much for any guidance and please let me know if need to elaborate more.