3 replies to this topic

[crikey87]

Hi everyone

I've replaced my head unit (Sound System) recently and now have buzzing through the epeakers when the engine is running, this escalates as the revs increase. I've spent a heap of time checking grounds in the system. I have a full FOCAL system with amp and subwoofer unchanged from the previous head unit. I've thoroughly checked grounds and found some loose fittings and thought I'd fixed but no change. The only other item replaced is a new 85amp Alternator, could this be the issue?

I'd be really grateful for any tips, thanks.

Len P

[greenhj]

Does the new alt have the capacitor fitted on the back?

[Rockoz]

A whine noise is generally attributed to the alternator.

Buzzing would normally be attributed to ignition system.

 

A suppressor capacitor should be fitted to the alternator output.

And another one fitted to the coil.

 

These are the primary sources of interference.

 

A toroid filter on the supply wire to the audio system may also help.

 

Cheers

 

Rob 

[Dr Terry]

What he said ^^^^^

 

Dr Terry