Alternator whine from the OGM-1?

[jhale2004]

Anyone else notice some alternator whine after they installed the new headunit?

[tazerbro]

Negative. You're sure its coming from the alt? I mean there is a tiny fan that is inside the OGM1 that you can hear if the radio is at 0 volume. The drain from the Nav should not strain the alt..

[Coolmaker]

Installed OGM-1 in my 2012 and no alt noise.

[CR CRUISER]

When I connected my Sirius tuner through the audio input jack, I had a fairly loud alternator whine whenever the Sirius head unit was turned on. I have since changed the Sirius connection to through the antenna and no more whine. It's definately alternator noise as it changes pitch as RPM changes.

[jhale2004]

The pitch changes with rpm so I think it is alternator.

[TimmyG]

Get a snap on frite bead, or take one outta an old comp montior

 

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[jhale2004]

Would I put it on the battery cable? Never heard of a ferrite bead. I always wondered what those things were on computer cords lol.

[stevo936]

I have had a slight whine on mine too since I installed. I called Walt and he said if I had the original battery that it could be the problem as it acts like an insulator for the whine.

 

He also said to try to run a ground from the ogm to the vehicle. I haven't tried this yet but I might. Mine is real faint and you really have to listen for it with the radio off while driving.

[TimmyG]

Put it on the power wire for the ogm

 

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[tazerbro]

Installed a 4ch amp and I too now am hearing the whine everyone speaks of. Mind you I am hearing this sound through the speakers, not the alt itself. Do you all hearing the sound have aftermarket equipment installed?

[jhale2004]

Walt gave the same reccomendations to me. Tested my battery and alternator multiple times and it is good. Gonna give the bead a try and then the ground wire. Should I just connect an additional ground to the harness to the radio and the ground to the truck somewhere?

[stevo936]

Walt gave the same reccomendations to me. Tested my battery and alternator multiple times and it is good. Gonna give the bead a try and then the ground wire. Should I just connect an additional ground to the harness to the radio and the ground to the truck somewhere?

 

Im not sure im guessing to just maybe take a screw out of the unit and then ground it behind the dash somewhere. If you do this and it works let me kno...cuz I will be doing the same:)

[jhale2004]

Ferrite beads from radio shack and additional ground had no effect. Gonna research the big 3 mod and see if it could maybe help.

[jhale2004]

Noticed something else also. There is a high pitched whine even without the engine running. The key in "ACC" mode, the radio down and nothin else going you hear a high pitched whine. It sounds like it is coming from under the relay box under the hood or something. You hear it best if you lay under the truck. I wonder if this is the same noise that varies with rpms that I hear inside while driving? I cant think of any type of pump or anythin that could run with the accesory switch. Ideas?

[iceman1998]

Since I installed my OGM-1 in the spring I've had the alt whine.....i'vetried a new batt, ran a seperate ground cable from the OGM-1 to the steel of the truck.... Moved wires away from each other and the whine is still there.....it drives me bananas