Hi John,
As spook would politely wish, hope you're well.
Just as a note of clarification, the 200 central locking was not used in the 7-series. There are no timer relays in the 2-series, just ordinary metal-cased Bosch as-reliable-as-rain-in-the-PNW SPDT relays. I would go so far as to say, no one has ever solved a central locking trouble by replacing one, although I'm sure many have been changed as a result of the general dim view folks take of relays. As difficult as these are to reach, I'm sorry for those who jump on the part swap approach with this advice.
The 2-series central locking holds the actuator as long as the switch (knob or key) is operated.
--
Art Benstein near Baltimore
“Never underestimate the difficulty of changing false beliefs by facts.” --- Henry Rosovsky
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