Yesterday afternoon, I stuck the dash back in the car, hooked up all the wiring and tried the turn signals. Right side, good, left side, no indicator and I could hear the flasher clicking a lot slower than normal. Checked at the cluster connector and had turn signal, but was still flashing slower than normal. I was hot, sweaty and pissed off, so I turned everything off and went to the house.
This morning, I went back down to the shop, disconnected the dash and set it aside, turned on the left turn signal and it was still flashing slowly. A data point nere is that when I pulled the dash oput, you have to turn the headlights on, pull the knob all the way out, to push a button on the bottom of the switch to get the knob and shaft out. This leaves the headlights on, so I stuck the shaft back in turning off the headlights, and parking lights, and the turn signal started flashing at the normal rate. Sounded like a bad ground. (Been watching too many South Main Auto and Pine Hollow Auto Diagnostics videos.)
Turned the headlights back on and walked around the car, and the left rear tail light was flashing dimly, and had no parking light. Popped the trunk and the turn/park light holder was popped out of the taillight housing. Popped it back in and the flashers worked properly. So I Plugged the harness back into the cluster and still no indicator. Pulled the bulb holder out, and there was no bulb in it! Turned the cluster over and shook it and the bulb fell out. I examined the holder and the little contacts looked deformed, so I tweaked them a little, stuck the bulb back in it and into the cluster, and now it works. The holder doesn't hold the bulb as tightly as it should, so I'm going to replace it so I don't have this problem again. I though I might have a spare bulb holder in all my collection of "sfuff", but I don't, so I'm going to order a couple, and when I get them, I'll reassemble everything, again.
Stay tuned...