Upon further investigation, after clearing error codes, the orange triangle stays off and I can push the SS button to get the light illuminated on the dash. However, the text message in the EVIC says "Stop/Start disconnected" when the light is on, and "Stop/Start connected" when the light is off. Something makes me think it should've been the other way around!
One of the error codes was 2209, even the tester didn't recognise it.
Went for a half hour drive, and it doesn't work either way.
Battery voltage measures 12.6V, and rises to 12.8V when I raise the RPM..
Have yet to remove and clean battery terminals, and although they look ok, I won't be sure till I've done it personally. I'll check the other ends of the cables too.
That sounds interesting, I'll give it a go. Thx.
Although if it doen't look obvious, I'll post some pics of the battery set up.
Regards
GB