OK, since no one has any shop recommendations, I'll proceed with Evil Plan Z.
As someone with few skills, I often look for help. I can usually take things apart and put them back together. However, I've got no innate auto skills -- didn't grow up working on cars, barely know how to even spell carburetor, thinks a cam is a big forward who used to play for the Bruins, etc. No better at electrical and wiring -- steered clear of EE during college.
With that said, I think I was just barely smart enough to figure out my problem. Brake lights don't work, then blinkers went intermittant. Now left is solid and right works fine. Hazard lights work fine on both sides. Getting power through the wires and the brake light switch. Bulbs are fine. Sockets are fine. Based on the combo of weird turn signal behavior, brake light failure, and 30 years of age, I'm going with the Turn Signal Switch.
Looks like that part is around $65 + shipping at most parts houses. Autozone has a part for $45. Interesting. Can also borrow a steering wheel puller from Autozone, so no capital investment in tools is necessary.
I've never pulled a steering wheel on any car before. I have no help and no friends who have any clue about cars -- my only source of help is on forums like this one.
With that said, and remembering that I'm borderline Brick Tamland, what do you think the odds are of a girl like me and a guy like you ... I mean, how difficult a job is changing this thing out? Is it just a lot easier to pay a shop $150 and not worry about it. No, I'm not rich and fall into the category of having more time than money; however, I don't want to crack the thing open and be stuck with a car in my garage with no steering wheel -- pretty tough to drive it to the shop at that point!