John,

I'm guessing you're not going to trace out the wiring diagrams to determine G terminal characteristics :)

So here is what I think they do, open to corrections:

G1 & G3 - X-bus controlled power
G2 & G5 #15, 1gn. switched power via fuse S18
G4 - D+ (alternator trigger circuit) via dash alt. led
G6 - dead end
G7 - power with headlight on
G8 - dimmer controlled panel lighting power
G9 - license plate lights circuit, via fuse S20
G10 - hot when windscreen washer runs (used for headlight washer)

and the M terminals below

M1 - tied to G7
M2 - power when low beams on

This is for my '86 syncro passenger van.

alistair