Bachmann Powerhouse 1985 train set with operating signal question.

[Trains old]

Hi
I got hold of a 1985 Bachmann Powerhouse train set and was wondering if anyone knew how the automatic signal works, I broke mine and could not work out how it went back together, so bought a new one, but looking at the new one I bought I'm still none the wiser. Thanks

[Trainman203]

That's a very old set.  Does the engine run?

[Trains old]

Yep, train runs great, just needed abit of oil after 35 years in storage, cost me £40 and all brand new, the box was battered but everything else sealed and new.

[Trainman203]

Cool