Engine/Alternator Whine Issue!

[chevyrider838]

Installed an old school Kenwood KVT-696 along with the BT-200 bluetooth box in my 99' K1500. Had terrible engine/alternator whine so I re-ran the grounds and the whine remains. Amplifier is on the rear cab wall, grounded to the jack box screw and the h/u is grounded directly to the battery. I've now installed (2) ground loop-noise isolators to the headunit rca outputs, one for front, one for rear, and the whine is only slightly better.....sounds like more of the whine is coming from the rear 4x6 speakers in the pillars vs the front 6.5's and tweeters connected at crossover.

Any suggestions on what else to do to get rid of this dreadful alternator whine? Thanks a lot!

 

[someotherguy]

If you have a real starter/alternator shop near you, try having them test your alternator.

Richard

 

[chevyrider838]

Thanks. A bad alternator could cause the whine and hiss?

 

[PlayingWithTBI]

Any suggestions on what else to do to get rid of this dreadful alternator whine?

Have you thought about a Ferrite Choke?

How Do Ferrite Beads Work and How Do You Choose the Right One?

Sometimes, I wish I could see electromagnetic waves. It would make detecting EMI much easier. Instead of having to mess around with complicated setups and signal analyzers, I could just look and see what all the fuss is about. While we may not be able to see EMI, we can sometimes hear it when it...

resources.altium.com

 

[AuroraGirl]

Thanks. A bad alternator could cause the whine and hiss?

what is your alternator, an original 99 cs130d or ad230 is gonna be quite old by now and the EMI may be all over

 

[Ehall8702]

Go old school, wrap copper wire around outside of rca jacks on back of headunit (the ground part , not the center pin) and ground the other end of that wire to chassis of head unit. It could be alt issue but chances are its just old equipment . Possibly cheap rca cables but im 98 percent positive wrapping the rca grounds and grounding them will fix ur issue. When all else fails , this has fone the trick for the last 27 years i been installing. Also, take those isolators off and throw em rite in the garbage! The drop sound quality more than punching holes in your soeakers woth a screw driver!