We're making progress, Gilly, although I think we're just finding out what works "right"...... :-)
Anyway, I tested the brake light switch, and it worked just as you said it should. So, what can I check next??

One thing I noticed is that along with the 4-wire connector to the brake-light switch, there is another 2-wire connector taped along side the 4-wire connector. It had an orange and brown wire, and it wasn't connected to anything. Is that correct??
Or did I just find the problem, although I don't see where it would connect to??

Thanks!!!

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Barry