Actually, when you get time, you might want to test earth's for the flasher unit.
With a full page draw the harness socket as you see it. Label them all, and watch someone check it.
On the top row I've got blank, blank, c, blank, 31, ta, tr, tl
Bottom row is R, L, 30, i, 15, blank, W.
Test with ignition on, engine off.
With test light clip on battery positive:
Touch probe to engine/frame bolt, the bulb will glow, your contact is good.
Put probe in W; test light off and on with hazard switch pressed.
Probe in ta; light off, and on when turn cancel is pressed.
Probe in 31; light should remain on.
Probe in tr; light constantly on while turn right switch pressed.
Probe in tl; light constantly on while turn left switch is pressed.
Don't let the probe touch anything else.