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Car Forum / Mercedes-Benz Cars / September 2005

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light switch source for radio static

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Cheesehead - 27 Sep 2005 02:53 GMT
I noticed a significant increase in static when the lights are on.
Is this a simple or expensive fix?
(Anyone out there ever clean a light switch?)

Collin
KC8TKA
E320/97
Peter W Peternouschek - 27 Sep 2005 21:43 GMT
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

> I noticed a significant increase in static when the lights are on.
> Is this a simple or expensive fix?
[quoted text clipped - 3 lines]
> KC8TKA
> E320/97
Martin Joseph - 28 Sep 2005 06:27 GMT
> I noticed a significant increase in static when the lights are on.
> Is this a simple or expensive fix?
> (Anyone out there ever clean a light switch?)

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
Cheesehead - 28 Sep 2005 13:06 GMT
Maybe a simple choke on the power would be the best solution.

Collin
KC8TKA
Cheesehead - 28 Sep 2005 16:11 GMT
Yes, it did.  Big time.
Martin Joseph - 28 Sep 2005 17:20 GMT
> Yes, it did.  Big time.

Care to explain what this cryptic comment means?

Marty
Cheesehead - 28 Sep 2005 20:52 GMT
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
Peter W Peternouschek - 28 Sep 2005 18:57 GMT
If the noise is proportional to engine rpm  I would bet that the problem is
caused by worn alternator brushes.
Peter.

> Yes, it did.  Big time.
Martin Joseph - 29 Sep 2005 05:50 GMT
> If the noise is proportional to engine rpm  I would bet that the problem is
> caused by worn alternator brushes.

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

Marty

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