need help - diagnosing audio problem

[Gurjit]

hey guys

my left speakers stopped working last week, all 5
regardless of the fade/balance settings

when I adjust the options for echo on my dsp the speakers do output the echoing sound but nowhere near the volume output as the right side speakers

I hooked up gt1 and inpa and checked for codes and did speaker output test and all speakers are working loud and clear with the test
monitored the balance/fader settings and everything checks out

does someone have a wiring diagram for the amp?

I would like to swap the amp input L channel with the R channel and see if the problem follows the input


anyone live in the lower mainland BC who can lend me their x5 for an hour and I can swap the radio module out, willing to buy lots of *BEER*

04 dsp+navi dsp2 6512-4127873-01 part#

what does the dsp2 stand for on the amp decal?


*I had to install a used radio module from a 2005 last year due to the sunroof water drain flap being stuck closed and water filled the battery box



on another topic iv read on some posts that because my x5 is built before sep/04 my Bluetooth is incompatible unlike the post 2005, can I just install a new Bluetooth module and not need any coding and I can use my iphone on Bluetooth?