I have audio problem with my 2013 gs350f. The problem is audio would sometimes work when I start the car. And other times it would not until I restart the car. But recently it doesnt work at all now. I've check all the fuse and amp. Everything seems fine. I tried to restart the console by holding down the volume ***. I do notice there was a yellow and blue wire that seem to be detached but is not in the bundles of the wires wrapped in the rubber sleeve with harness connecting to the amp. My local dealer charge $210 for diagnostic and not sure the total cost needed to fix the issue. I have a after Market sub installed by bestbuy I assume the golden wire was added and spliced onto the blue wire for the sub/amp but I don't see an input terminal on the amp or sub to take the golden wire. (I assume is for the amp controller that is not being used). I capped the yellow wire not knowing where it goes and thought maybe is causing a power short causing audio not working. Thank you guys and ladies!

 

You might be at the mercy of the unknown (and maybe long-gone) Best Buy installer to help figure out and troubleshoot the mysterious wiring issue.

 

Forgot to mention. The SOS works and there's sound. So wierd 😂

 

@Seek3n - I suggest you look into the possibility of these two things:

(1) If you have added a device through one of the inputs, this could be causing a software conflict. Maybe a USB cable attached component or a Bluetooth connected component. Troubleshoot by temporarily eliminating any added device to expose the problematic culprit device...

(2) If you have the volume gain cranked up too high the amp may be going into protect mode and shutting down. Turning off the car and restarting it probably resets it and everything seems to work again... Troubleshoot by lowering the volume gain for an extender test period of time to something under eardrum rupture level of 150dB - maybe try something more reasonable like 75db!

 

Thanks for the comment. This problem only started early this year. The restarting the car used to work sometimes(sometimes needs mutiple reatart &#128517. But now it doesn't work at all now. The aftermarket sub and amp was all i added and the install was done back when I got the car in 2013 and it has its own amplifier. Volume for the media console is not high, i dont know the db. But volume is like 18-30. Following your suggestion. I turned the volume to 0, unplugged the battery ground waited few minutes. Still doesn't work. Nothing connected to USB and Bluetooth is not connected.

 

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What is SOS? Anything like the SOS function in a BMW?

 

It's hard to diagnose without being there in person, especially someone else's work.

The only thing I can say is that the circled white wire is the amp turn on signal. I'd assume at least one of your wires (likely the amp turn on wire, which are sometimes blue) was being connected to it.


It doesn't look like anything is connected to it now, so the wire that was there just have pulled out. If it pulled out, it's possible it may have done so with some force, possibly breaking the white wire internally such that it doesn't always give a consistent connection. Try wiggling it a bit and see if it changes how the ML amp turns on. Alternatively, you can check voltage to the back of the connector (that goes into the ML amp) and see if you have consistent voltage when you wiggle the wire, or in the cases where the amp is not turning on.