View Single Post
      09-06-2013, 08:07 PM   #76
ctuna
Brigadier General
 
Drives: 325xi 06 wagon MT
Join Date: Jan 2010
Location: Santa Cruz, Ca

Posts: 3,641
iTrader: (0)

The trick that people where using to isolate

The trick that people where using to isolate the problem was remove
the Input to the amp and inject audio from cd player or some other source.
If the noise is not still there then its further uptream . One guy injected signals
at the Radio Harness and found no noise. When he got a new radio the noise disappeared. This was with no level shifting devices.

http://www.e90post.com/forums/showth...hlight=mj777lr
http://www.e90post.com/forums/showth...hlight=mj777lr

Try a different amp as the others have suggested if the noise is still there with and injected signal.

Last edited by ctuna; 09-06-2013 at 08:23 PM.
ctuna is offline  
0
Reply With Quote