light switch source for radio static

It may not be the switch....I would look for a simpler solution first and check / clean the connectors at the head / tail lights. Peter

Probably related to the alternator? Try turning on the rear defog and I bet it gets even louder?

Could be tough to troubleshoot though...

Marty

Maybe a simple choke on the power would be the best solution.

Collin KC8TKA

Yes, it did. Big time.

Care to explain what this cryptic comment means?

Marty

If the noise is proportional to engine rpm I would bet that the problem is caused by worn alternator brushes. Peter.

It was more closely related to your post than my initial response. Yes, there was more static when the rear defroster was turned on.

Collin

This seems like a good theory and a relatively inexpensive fix too...

Marty