In article op.t4gj3jdxyuobwl@lucy, says...
NiCad battery in there which has popped its clogs. I am thinking that
this would be a good time to replace this 24 hour timer with a 7 day
timer.

In which case label all the wires before you start & it's easy.

1001 uses for a digital camera, #328: take a photo of it before you
disconnect anything.

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Cheers,
John