Okay, then. Embarrassed as I am, here is my conclusion to this stupid problem - it has been a humbling experience. Those of you that know this can have a hearty laugh but - and here's my secret - fuses can be intact but CORRODED! Therefore, I am changing ALL of my fuses today, because they all look about the same as the one I replaced. Thanks for your help Jeff. At least it was a cheap fix, cost to ego not included!
Bye for now,
Nick