Having similar issues and I live in the middle east.
Nothing works as there is no audio from the radio, even though i replaced amp and radio. Worked for a while then sub stopped working, then completely stopped working (after i left the battery off for a bit). all i hear is low static like a thud noise once instead of chimes when i open the door.
Also recently the driver door controls stopped working for a while then worked when I turned off and on again. Now recently started getting service airbag light. I just bought it recently and already spent too much in repairs (brake booster, used transfer-case, 1 ball joint plus a lower arm, rod ends and the joints and some bushes). service 4WD showing up now and then when hot i think as it goes away after ive switched off the vehicle for a bit. Think i got scammed.