Tried to use my Haynes manual to take out the ignition switch, but it just says that after taking off the under dash and steering column covers, to unplug the electrical connector and take out a retaining screw. I've no idea how that 3 layer plastic connector with the open sided little tang on the end safely comes apart, plus it looks like there are two screws facing the cabin in the metal casting.
Checked the amplifier/power stage as instructed in the manual. With key on checked for voltage at terminals 4 and 2. It said voltage should be present. It was at 4 but not at 2, which seems reasonable considering 2 just seems to be a ground! Then it says to crank it with the connector out while checking for voltage between 5 and ground. It fluctuates between 0 and roughly 1.5v.
As stated, coil resistance is within spec. Manual says to check the ignition control unit switching function but doesn't say how to do that!
Looking at the wiring diagram I don't really see how those gauge indicators are supposed to light in the key on, not running position just before cranking. It just shows the positive going to most all of them in that position, but how it completes the circuit to test them all I don't see.