Power Antenna Woes-85 300SD

[regsatx]

It appears my antenna is history. It is getting current from radio (aftermarket Pioneer AM-FM-CD installed by previous owner) but I can't hear motor working. I assume this means motor is gone since it is getting power, and I can't just replace the mast???
Any other suggestions for verification motor is fried??? And if so, best place to obtain compete antenna w/motor, as I don't know you can just replace motor. I'm just a so-so do-it-yourselfer, so help is welcome. Radio works OK, but several stations fuzzy. CD, of course, works fine.
CAN I JUST FORCE UP THIS ANTENNA A BIT UNTIL I REPLACE to improve reception??? If motor gone, would that hurt anything???

85 300SD,
225k Astral Silver