Bought my first car this week!

[Electronic M]

Impersonating the voice of Doc Brown from back to the future: 'No wonder this part failed, it says made by GM'...
I had to start watching TV about 20 minutes into the coil work to avoid death by boredom...
It would seem the previous owner or the guy before him had discovered the bad relay since when I found it it was VERY loosely bolted in.

Well the 8-track radio I was going to install until I can get a working quad unit together must have felt sorry for the quad since it did nearly the same thing...It's FM band worked for just a bit during testing (just long enough to tease me) in preparation for installation then after checking the AM went dead. UGH! The two units now compliment each other in malfunctions. I'm getting fed up to the point that I might just hack in a 90's radio/cassette player and be done with it. I'm not too keen on being limited to just AM-FM let alone the drifty one in my Lincoln currently...That thing is so bad that I practically have to drive with one hand on the tuning knob sometimes....Were all 70's car radios finicky heaps or have I just been finding all the bad ones?
I wonder if Muntz sold any tube AM-FM/4-track tape car stereos?...Those I could at least properly trouble shoot and repair without a schematic.