Decided to see if I could find out why motor failed.
Checked continuity in armature and it was good.
Checked wiring in brush module. There is an unidentified component in that module that has an open circuit. It is the item marked Otter 1 in attached diagram. The copper coils are no doubt chokes and would act as a noise suppression filter.
I did a search for Otter + UK (Item says "British Made"!).
As it turns out, they make overload devices for automotive motors. So I guess that is what that part is. But it is supposed to reset! It would be easy enough to replace if we knew specs & source. Maybe get to that once I have used up my 3 spares!
Well at least replacement motor is working fine!
__________________
Graham
85 300D
,72 350SL, 98 E320, Outback 2.5