radio blues

[Mark Trank <mtrank%acva@mail.co.albemarle.va.us>]

On my recently acquired 5k, I discovered the antenna mast (FUBA) was 
cracked.  It appeared that the motor unit was running, since everytime I 
turned the radio on, I heard the unit running, even though the antenna 
didn't move.  OK.......so I had the mast replaced.......but now the motor 
doesn't run at all. Radio has power and is grounded, and fuse is 
fine....but motor is silent.  Anybody ever encounter this phenomenon 
before?  Am I looking at a new motor?  Possible relay problem?

All helpful suggestions and insight are welcome, as always.

TIA,   
Mark
mtrank@acva
87 5kcstq/140k+ miles