My 2005 Yukon XL

[DieselSlug]

Spent some time really trying to put together wiring diagrams for the audio system. Just really trying to understand its grounding system more than anything. Its so tough to find any decent wiring diagrams without some type of expensive subscription or a sweet set of original GM documents (not sure if they went digital in terms of OEM manuals by then). Looks like the radio circuit is different than the amp circuit per mitied diagrams I found. Not sure if the rear seat entertainment is different yet.

Messed with some temporary grounds without hacking any wiring and nothing seemed to rectify the whine. I tried pulling the antenna as well for a check and no change. Out of the bazillion posts, threads, etc. that I looked through 1 mentioned pulling the Rear Seat Entertainment plug from the module. I did this and would say most if not all the noise was gone while revving the engine! I am going to leave this unplugged for now and see what else this took out past the rear seat controls. I need to correlate the grounds between each of these systems.

 

[dbrannon79]

This whine only started when you installed the aftermarket stereo? if so, I bet it's something to do with the voltage going into the stereo. the adapter you have iirc is can bus and provides a keyed power source to the stereo. you might need to try installing an inline one-way diode in the keyed power between the stereo and adapter as well as possibly a capacitor on it to ground. might even do this on the constant power supply too. the whine is only getting amplified at the rear seat entertainment, if it has it's own amp, it's amplifying it from the stereo.

basically what's happening is you are not getting a clean 12v power into the stereo, any tiny pulsations from the alternator or coil packs some stereos will easily pick up and amplify it through the speakers. you need a noise filter. a diode will eliminate any AC voltage leaks and the capacitor will smooth the hz signals in the power to create a solid 12v power.

 

[DieselSlug]

This whine only started when you installed the aftermarket stereo? if so, I bet it's something to do with the voltage going into the stereo. the adapter you have iirc is can bus and provides a keyed power source to the stereo. you might need to try installing an inline one-way diode in the keyed power between the stereo and adapter as well as possibly a capacitor on it to ground. might even do this on the constant power supply too. the whine is only getting amplified at the rear seat entertainment, if it has it's own amp, it's amplifying it from the stereo.

basically what's happening is you are not getting a clean 12v power into the stereo, any tiny pulsations from the alternator or coil packs some stereos will easily pick up and amplify it through the speakers. you need a noise filter. a diode will eliminate any AC voltage leaks and the capacitor will smooth the hz signals in the power to create a solid 12v power.

The whine has always been there when selecting the XM radio function with the OEM HU. Normal radio, it wasnt there before. Now with the aftermarket radio the whine is across all sources BT, radio, and Aux. I think I am going to try an InstallBay 30A noise filter on the incoming power to the radio eventually. They are dirt cheap on eBay or Jungle store. As much as I dont want to hack or change the stock wiring, I may run dedicated grounds for the radio, amp, and RSE. I want to go de-pin some wiring at the JY and grab a few pigtails to connect in case I ever want to go back. Just trying to get it "tolerable" for now to buy me more time.

There is definitely still some speaker noise coming through even with the RSE unplugged after a couple droves today, but its 75% better id say. Once your moving the noise of the vehicle overcomes it.

I also got the new mic installed up by the rearview mirror. Unfortunately I ordered at 3.5mm jack and not a 2.5mm. Idiot, the adapter is on order and will be here tomorrow.

 

[dbrannon79]

You shouldn't have to cut into the factory harness. Here is the pic you posted of the harness adapter. I believe the connector I circled is the power and ground for the aftermarket radio and the bigger grey connector plugs into the factory harness. you can splice into this that I circled and install the noise filter along with tee-ing off on the ground and to a eyelet to the dash ground.

One thing I found for butt splices is the solder splices. I had never used them before, but recently tried some when I was building a harness for one of my 3D printers. those things have very tiny wires and I didn't want to have rigid bulky butt splices in the harness. those solder heat shrink splices are my new favorite go to now!

 

[dbrannon79]

Oh and btw, on the pic I posted, right above the RCA jacks, that looks like a noise filter. if the power wires are running though it, it might be bad or if it's one of those (I forget the name) that has a small circuit with a micro transformer / choke coil. that might be the issue. you pulled it from a JY, so it might be old enough that the capacitors in it have failed.

 

[dbrannon79]

I found something interesting. and I think you mentioned this too. a ground loop that might need to be removed.

Whining noise in the radio

Hey whats up. Just wondering if anyone out there encountered any type of problem with a sligjt whining noise coming from the radio. i really cant narrow it down as to when it does it but is pretty annoying. It doesnt do it all the time either. I have an 2008 LTZ. Thanks

www.tahoeyukonforum.com

Ground loop problems and how to get rid of them

Ground loop problem solving pages which tell how to get rid of those annoying humming problems in your AV system

www.epanorama.net

 

[DieselSlug]

You shouldn't have to cut into the factory harness. Here is the pic you posted of the harness adapter. I believe the connector I circled is the power and ground for the aftermarket radio and the bigger grey connector plugs into the factory harness. you can splice into this that I circled and install the noise filter along with tee-ing off on the ground and to a eyelet to the dash ground.

One thing I found for butt splices is the solder splices. I had never used them before, but recently tried some when I was building a harness for one of my 3D printers. those things have very tiny wires and I didn't want to have rigid bulky butt splices in the harness. those solder heat shrink splices are my new favorite go to now!

View attachment 98125

Yes, I will definitely do that.

Oh and btw, on the pic I posted, right above the RCA jacks, that looks like a noise filter. if the power wires are running though it, it might be bad or if it's one of those (I forget the name) that has a small circuit with a micro transformer / choke coil. that might be the issue. you pulled it from a JY, so it might be old enough that the capacitors in it have failed.

There was a name for it I saw through all my searching but it has completely escaped me. I did also remove some of the electrical tape to try and peel the speaker wires further from the speaker wires. And ultimately, your right. There could be an underlying issue here that I would have never known about due to JY parts!

I found something interesting. and I think you mentioned this too. a ground loop that might need to be removed.

Whining noise in the radio

Hey whats up. Just wondering if anyone out there encountered any type of problem with a sligjt whining noise coming from the radio. i really cant narrow it down as to when it does it but is pretty annoying. It doesnt do it all the time either. I have an 2008 LTZ. Thanks

www.tahoeyukonforum.com

Ground loop problems and how to get rid of them

Ground loop problem solving pages which tell how to get rid of those annoying humming problems in your AV system

www.epanorama.net

Thanks I will take a look at these links later today!