Your ground test shows the wiring is good from the trans to the coil.

You can test the transistor with the power off, with a VOM. If you just want to shotgun, replace the trans with a higher rated TIP102 and replace the little pre-driver transistor too.

Did you replace your flashers with LEDs?

.2 does not sound good at all.

You can check any of the same transistors that are next to it to see the correct values.

I'm on my phone so I can't look it up for you, but if you download the manual, you will see the correct trans on the schematic attached to Q83 (and this is a good, easy, exercise in learning to read schematics, too).

Transistors can fail as open, as a dead short, or just not work. Of course the hardest to diagnose is the just not work.

But if all the other transistors read .6 or .4 and that one reads .2 - you found a problem right there.

-

Testing TIP102:

Meter in DIODE mode.

Black lead on center tab of transistor (there is a hole in the center tab - it's right on top of the transistor).

Red lead tests each outside leg.

Readings should be between .4 and .6

If you reverse the set up and put the red lead on the center tab, the outer legs should read 0.

Test your work by checking other transistors around the bad one.

-

Testing the little 2n4401:

RED lead to center leg.

BLACK on outside legs.

Should read between .4 and .6

(Anytime a TIP102 is killed, always replace the 2N4401 at the same time, if it's not dead, it's probably stressed anyway)

Another transistor is probably bad, although I could be a number of other things.

Check the coil, make sure it's more than 3 ohms.

Check the coil diode also (unsolder one leg) .