[W126 Coupe] Radio cuts out when playing loud

[Dan Landiss]

Shayegan, Richard wrote:

>How are these for stupid questions:
>where do I measure the voltage at?
>  
>
The battery

>so if it doesn't charge 14-14.5, does that indicate the voltage regulator or the alternator?
>  
>
95% of the time, the regulator. The brushes are an integral part of it, 
so you replace the brushes and regulator together for about $40.

If the belt is squealing and the alternator body is hot, it could also 
be a shorted battery cell, and the voltage will not get much above 12.

--
Never argue with a dragon, for you are crunchy and taste good with ketchup.