GX470 Pioneer (?) Radio is kaput... Things to check?

[2cam]

Hey team Mud,

Hope everyone is having a great weekend! The radio in my wife's GX decided to stop working this past week and I'm looking for a bit of guidance on trouble-shooting the issue. Looking at images online, it appears that it's one of the Pioneer (non-NAV, non-ML) systems. I've checked and replaced (just to be sure) all three audio-related fuses (two under the hood, one under the dash) without success. The radio turns on/tunes perfectly, the CD loads fine. There just isn't any sound. Most likely it's the amplifier (under the seat I believe), but want to be sure before I order one online. What else should I check?

Thanks for the guidance!

2cam

 

[Wetseat Bottoms]

Do you have sound if you plug into the rear set entertainment jacks? Looks like that is seperate from the amp.
Looks like the amp is powered on radio 2 fuse and is the red with blue stripe wire at the amp.
Also check 7.5A guage fuse.
If you have a multimeter you could use it to check the output from the radio.

 

[2cam]

Do you have sound if you plug into the rear set entertainment jacks? Looks like that is seperate from the amp.
Looks like the amp is powered on radio 2 fuse and is the red with blue stripe wire at the amp.
Also check 7.5A guage fuse.
If you have a multimeter you could use it to check the output from the radio.

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View attachment 2356319

Thanks for the great and thoughtful response! Per your suggestion, I checked the rear headphone jacks, but didn't have any sound from them either. However, I'm not sure that they've ever worked as we haven't used them. I removed the amplifier to take a few pics of the connections and part label and then put the amp back in the car. Interestingly, it started working. Weird. So, not sure if it was a connection issue or something within the amplifier, but we now have sound. Crazy.

2cam

 

[Wetseat Bottoms]

Great ! That's the best outcome.