Left speakers went out.

I recently lost all 4 door speakers with no sound. The front tweeters still work. Everything on my head unit works as expected. I did the stealth install. I read Only tweeters working on 2007 Prius | PriusChat

"it does sound like a toasted head unit. the tweeters are on the same wires as the front door speakers, so that's not likely a wiring issue, and all 4 speakers aren't going to have wiring issues at the exact same time. silver lining is that now you have a reason to replace the factory garbage with a quality head unit, something which Toyota didn't offer."

Dude replaced the head unit to no avail.

Ended up being the speakers: "Amazingly, It was the speakers!! Actually tested all 4 speakers with my radio in my house, no noice and no reading on a multimeter at all. and then took a house speaker and tested with car wires and worked great... Never would've thought all 4 would be dead. the new rockford fosgates from Crutchfield should be here Friday."

I never replaced my speakers and it's a 2007 so I might try to test the speakers before I rip the dash apart since it's a pain.

 

My plan is to get to the wiring then run a voltmeter or hook up one of the aiwa house speakers I hope I can find. It's weird, when my audio went out I was watching a youtube video and double tapped to seek back then all my speakers went out. But the tweeters still work.

 

I hooked up a house speaker which played through the door wiring so I knew it was the speaker. I replaced all 4 door speakers and it's working great now. I had sound coming out of the two tweeters but they were very quiet (I doubt they actually do much). I did find if the tweeter is unplugged the door speaker doesn't work. (I was thinking about unhooking the tweeters since they sound like crap, but then the door speakers don't work) I would suggest getting a simple 2 wire house speaker and hooking it up to the door connection and test it before you rip out the dash. I had people suggest it was the head unit when it wasn't and saved me quite a bit of labor.

 

So your issue is driver side front and rear speaker not working? The tweeter swap would just tell you that the tweeters are probably fine. Your 2 left side speakers could be bad, or wiring, or possibly head unit. If you don't have a 2 wire speaker, you could test with a multimeter if you have that.

 

My tweeters were "working" but they don't sound great when my four door speakers were all bad. I don't think the tweeters working mean that the door speakers are not broken. I would suggest trying to get a 2 wire speaker to test the door speakers. But, if you want to pull the head unity you could I just don't know how to test it. I supposed you could use a voltmeter on the pins but it would have to be powered on and that is only ruling out 1 problem (the head unit) instead of ruling out the head unit, wires and speakers by trying another speaker in the door. I replaced the door speakers with $25/pair speakers

. You might be able to buy a cheap used speaker off ebay to test or just get a door speaker to test. But it's up to you.