Do I Bypass Bose amp or is it a different problem?

[Sidious999]

Hi everyone,
I have a 2007 Yukon Denali XL
And I have replaced the factory head unit. Everything is working great except I get a very slight static , engine whine and sometime's beeping when the brake pedal is applied. (All only audiable when the music is off or low volume. When I turn the music up it's not easily noticeable) but it still drives me insane

I have tried different grinding methods, ground loop interfaces. I'm beginning to wonder if the head unit doesn't like the factory Bose amp. I think I need to bypass it but unsure of how? I know the amps location but not sure what to do with what wires.

Now before you say anything about the bypass procedure , I've already had to replace my Bose speakers in the vehicle with non-Bose speakers. (This problem occurred with both types of speakers)

Otherwise I was gonna perform a big 3 upgrade and test the alternator. The battery is brand new.

 

[kbuskill]

Hi everyone,
I have a 2007 Yukon Denali XL
And I have replaced the factory head unit. Everything is working great except I get a very slight static , engine whine and sometime's beeping when the brake pedal is applied. (All only audiable when the music is off or low volume. When I turn the music up it's not easily noticeable) but it still drives me insane

I have tried different grinding methods, ground loop interfaces. I'm beginning to wonder if the head unit doesn't like the factory Bose amp. I think I need to bypass it but unsure of how? I know the amps location but not sure what to do with what wires.

Now before you say anything about the bypass procedure , I've already had to replace my Bose speakers in the vehicle with non-Bose speakers. (This problem occurred with both types of speakers)

Otherwise I was gonna perform a big 3 upgrade and test the alternator. The battery is brand new.

The engine whine is probably coming from the rear speakers. To test this, try hitting the power button on the rear audio controls on the back of the center console to turn off the sound going to the rear speakers.

If that stops the whine then pull the rear audio controls and tighten up (slightly/carefully bend) the associated pins where the harness plugs in.

I can't remember the pin numbers off the top of my head but if you look at a diagram it will be for the ground leads. I want to say it was pins 13 and 15 but I could be wrong... it has been a while since I did mine but they are near the center of the harness.

Anyway that completely eliminated the whine issue for me.

I too get the strange almost inaudible beep when pressing the brake pedal... yo be honest it has never bothered me enough to investigate it further. I always assumed it had something to do with the back up sensor system acting up.

I also have an aftermarket HU (Rosen GM1210)

Anyway... hope this helps.

 

[Sidious999]

Hey thanks for your info . My rear controls don't seem to work with an aftermarket unit. I'm not too sure if they worked before but will look at this to see . Thanks

 

[kbuskill]

Hey thanks for your info . My rear controls don't seem to work with an aftermarket unit. I'm not too sure if they worked before but will look at this to see . Thanks

No problem... glad to help.

I hadn't thought about your HU not keeping the rear controls functional.

My Rosen keeps ALL the factory stuff working as intended.

But it's worth a shot anyway.

 

[iamdub]

Andrew, what interface are you using? I recently switched from an Axxess GMOS to a PAC GMLAN and am liking it much better. There are even better ones than the PAC, but these are the two I had on hand already. The Axxess had little quirks in it's operation, one of which was a static-like "tick" or "hiss" sound right before it played any warning tones. The reverse sensor beeps was the most prominent.

 

[Sidious999]

Using
PAC RP4-GM31

 

[Sidious999]

Maybe I should try a different harness? One that bypasses the amp?

 

[iamdub]

The beep when braking that you and Ken experience lead me to believe that it's an issue with the interface. Although, I thought the Rosen was plug-and-play with no interfaces needed.

You may have additional problem(s) that are the cause for the static. Could you connect a speaker (small speaker from a house stereo or surround sound would work) to each of the radio's speaker outputs and unplug the RCAs that feed the Bose amp? This would at least isolate the amp in the equation. If the sound is still there, then you'll know it's either the HU or interface.

 

[Sidious999]

The Bose amp does not have any rca. It's just factory wiring harnesses. (3 of them)

I might try ordering a new interface to try sometime. Any recommendations?

 

[kbuskill]

The beep when braking that you and Ken experience lead me to believe that it's an issue with the interface. Although, I thought the Rosen was plug-and-play with no interfaces needed.

You may have additional problem(s) that are the cause for the static. Could you connect a speaker (small speaker from a house stereo or surround sound would work) to each of the radio's speaker outputs and unplug the RCAs that feed the Bose amp? This would at least isolate the amp in the equation. If the sound is still there, then you'll know it's either the HU or interface.

There are no additional interface modules with the Rosen. You simply choose the correct harness when installing.

It has one harness for the Bose system and a different one for non Bose.

If you hook the non Bose harness up to a Bose system it will overdrive the Bose amp and cause everything to be excessively loud. Conversely, hooking the Bose harness up on a non Bose system will cause the speakers to be under driven and the volume of everything will be extremely low.