1991-740 wagon radio problems

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

 

There is a radio interferrence suppression relay under the hood. If
yor car is a non-turbo, it is attached to the frame holcing the coolnt
tank on the right hand fender well. If you own a turbo, the relay is
in approximately the same position on the left hand fender well.

I would check that item and the connections.

joe

 

corrosion on you leads most likely

 

Check the ariel is still connected to the lead for the radio. Also there
should be a grommet type thing at the bottow of the well, it has a flap
of rubber over a hole to let water drain out. Make sure it's not blocked
with debris.