1 out 0f 4 speakers working

[indigo.doyle]

hey was looking for some tips on where to start diagnosing my 2009 rx navara (spain). when using the headunit only one speaker plays audio. also im looking for the service manual 2009 model. can only find 2007 frontier. is it the same manual???

thanks

 

[Old.Tony]

The 2006 to 2010 cars were nearly identical. Frontier (USA) is the same as the Navara (rest of the world) except the steering wheel is on the wrong side.

With most of the speakers not working, I'd suspect a cable problem behind the stereo before looking elsewhere, because what are the chances that all 3 doors have the same problem? It could be an earthing problem (easy enough to add a test wire from a bolt under the dash to the door latch and see if that speaker starts behaving, then it IS an earth issue) but I'd suspect the more common part first.