To All….. thought at this point, since I have received and followed up on so many good replies, a short recap of what I have done is in order.

Battery……brand new and no defects
CLP/SSM…..bone dry and pristine, no corrosion ever
RCM…..appears as new, no detectable cracked joints, relay armatures move freely
BCM…..replaced with another unit with no detectable difference in spoiler operation
Jim’s modification……..performed yesterday but have not road tested

I will be installing a new RCM to ensure old one is really good.
Will advise all of you in a few days

Many Thanks
Paul