I live in rainy Victoria BC and have recently started to experience a radio
problem.

The left rear storage compartment in my wagon is where the motor for the
antenna is.  With so much rain lately (and a small leak through a cracked
tail light lens!!), the storage compartment was half filled with water! I've
drained it and dried everything out and things still work mechanically (ie,
the antenna goes up and down), but there is a very loud and annoying noise
coming from the radio speakers.  All the antenna connections were dry and
tight.

Whenever the engine is turned on, I hear a very loud buzzing sound (over the
normal station reception), and this is even worse when I operate the
electric windows, or when I accelerate.

Does this have anything to do with the antenna or have I been chasing the
wrong issue?

Suggestions?

Thanks