You may just have some burned out bulbs in the instrument cluster. The left turn signal indicator in my 1981 was not working, nor was the high beam indicator. A couple weeks ago I pulled the instrument cluster out far enough to replace all ten of the Type 194 bulbs. Figured I would just do all the bulbs while I had the cluster out. I now have a working left turn signal and high beam indicator. Before replacing the bulbs, my turn signal and high beams both worked, just the indicator lamps were out.
At first I could not pull the cluster out far enough to get my hand in there to disconnect the speedometer cable, so I disconnected a mount in the engine compartment that secures the speedo cable to the body and that gave me plenty of slack to pull the cluster out far enough to depress the tab on the cable and disconnect it from the cluster. Then I removed the right side wiring harness, and was able to pull the cluster out far enough to replace every bulb without having to disconnect the two wiring harness connections on the left side.
Also, I went to Advance Auto and they wanted $3.50 ea. for the Type 194 bulbs. I got on Ebay and ordered a 10 pack for $8.45.