There Has to Be a Better Way.

[Reece]

It's all just circuit tracing. Good for you. So is the radio working OK now? You might want to go back through and look at all chassis grounds: they might look OK but have hidden corrosion that will show up later as intermittence or silence. What some do is grind a bit on the chassis right next to the grounding lug and with a heavy iron or gun get solder from the lug right over and onto the chassis.