I have tracked down the service manuals for many of the early toyota radios. Some are on microfiche. Some, like the 60 series and hilux pickups I have had to spend the hours to figure it out on my own.
The coil can fail with turn to turn shorts or it can just open up. It will change as it heats up. You can get a good spark testing it with an open plug but the spark will be weak when under compression. My old JD 140 with the 1 cylinder Kohler goes thru a coil about every 10 years, due to...
You will have to drop the WS down and remove the big rubber gasket. Then drill out the spot welds across the top and grind off the end welds to remove the dash panel.
Installed AC Condenser
Started on these today, lots of soaking in penetrant oil. Once I got the drive plate loose, I cut up the u-joints with a cut off wheel. I think I'm going to give them a coat of por 15.
I made a little progress this week. Very busy at work too.
I de-rusted this in the bucket a few days then painted it up. You can see where the PO cut the PTO bearing tabs off the old one.
It is pretty tight to work in there. It about killed my Dremel. I used some 3/8 button head bolts...