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Radio not working?

Tiny
NOTAMECHANIC32
  • MEMBER
  • 2005 SCION TC
  • 4 CYL
  • FWD
  • AUTOMATIC
Im not a mechanic by any means, so any help will be accepted and I'll be grateful. I bought my 2005 scion TC (used) with an after market radio installed and with no sound. The radio is fully functional. Behind the radio when I pulled it out I found one harness/bracket of wires connected and a bunch of loose wires. I figured maybe this was ok and decided that the speakers were blown or no longer in the car, so I ordered speakers and amp and me and a friend installed them (mainly him). The amp has power and it is all ran/connected/wired correctly to my knowledge, But still no sound. So if anyone could help I would be very grateful. And I've checked all fuses connected directly to amp and radio (HU) itself but not the ones in the cars fuse box? I've read and asked around and most answers are I need to fix the radio harness/bracket or find a way to connect the rest of the "Loose wires". I can figure out details of radio(HU)/amp/speakers when and if needed.
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Wednesday, March 4th, 2015 AT 12:21 AM

12 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,128 POSTS
Keep in mind, even thought the radio turns on and appears to be working, there may be no output from it. Basically, there is no signal from it to the speakers. Even with a new amp and speakers, if you have no signal, it won't work.

Since this is an aftermarket stereo, I will not have any type of wiring schematic to follow. Therefore, I need you to remove the stereo and take it to an audio shop and have them check if there is any output from the radio. That is the only way we will know if it works.
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Wednesday, March 4th, 2015 AT 5:35 AM
Tiny
NOTAMECHANIC32
  • MEMBER
  • 7 POSTS
Thank you Jacobandnickolas, I've considered that option but I want to make sure this Isn't something I can fix myself before I pay somebody to do it for me. Although, it's very annoying not having music play after spending the money on the amp/subs to no avail.
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Wednesday, March 4th, 2015 AT 7:13 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,128 POSTS
I understand. I feel that there is just no output from the radio. Here are the wiring schematic for it in the diagrams below and a guide to help test it.

https://www.2carpros.com/articles/how-to-check-wiring

Check out the diagrams (Below). Please let us know what happens.
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Wednesday, March 4th, 2015 AT 11:00 AM
Tiny
NOTAMECHANIC32
  • MEMBER
  • 7 POSTS
No I don't, unfortunately. I have reason to believe that the cause is the fact that there is only one wire harness connected to the back of the HU when I believe there should be 2, considering all of the loose wires (where harness #2 should be) the old owner of the car must have messed up the wiring before I purchased the vehicle and now im stuck with a mess.
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Wednesday, March 4th, 2015 AT 11:11 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,128 POSTS
Most likely you're right. Usually there is one plug for the power supply and another for the speakers. However, if you wired an amp to it, then you had to wire to the speakers and there had to be an output from the radio.

Tell me the exact brand and model of the radio. I have a great friend that owns a stereo shop. Maybe he can guide me. I can't guarantee anything, but it won't hurt to stop and see him. Let me know.
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Thursday, March 5th, 2015 AT 6:28 PM
Tiny
NOTAMECHANIC32
  • MEMBER
  • 7 POSTS
Thank you, I bought a new HU and new wires harnesses. The HU came with the brackets I should need to install it correctly, Ill get back to you as soon as I install it (hopefully right this time) and let you know how it goes! The old Hu was trash as far as I was concerned considering it had cd player xD
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Friday, March 6th, 2015 AT 3:07 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,128 POSTS
Sounds like a plan. Let me know how it goes.
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Friday, March 6th, 2015 AT 5:07 PM
Tiny
NOTAMECHANIC32
  • MEMBER
  • 7 POSTS
Just installed new HU sony (cdx-gt66upw), HAVE SOUND NOW! But have new problems. Amp doesnt go off with car, and subs aren't pushing sound, only car speakers? And amp remote doesnt have power?
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Friday, March 6th, 2015 AT 6:39 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,128 POSTS
It sounds like you supplied power to the amp from a constant hot fuse. Just switch the power supply to a keyed fuse. That way it will shut off with the key.

As far as the subs, are you certain they are wired properly? Does the amp make a difference through the car speakers?
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Friday, March 6th, 2015 AT 6:43 PM
Tiny
NOTAMECHANIC32
  • MEMBER
  • 7 POSTS
As soon as I commented about them not working I went out there to fool around some more and got them going, though the stock speakers are making the music the subs are producing the bass. Im not certain that thats how it should be but its ok for now. I just expected the subs to do the work and the stock be backing them up? XD and as for the amp going off, the "Power Protection" light stays on even with the car off. Idk if it should be on or off.
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Friday, March 6th, 2015 AT 7:48 PM
Tiny
NOTAMECHANIC32
  • MEMBER
  • 7 POSTS
And its hooked to the "Rem Out" wire that came with the HU.
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Friday, March 6th, 2015 AT 7:50 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,128 POSTS
I would have to look at the manuals to determine why the power light is staying on. As far as the subs, based on what kind they are and their size, usually that is all they are really designed for, bass. Keep in mind, I'm sure there is other sound coming from them, but again, their primary purpose is to produce bass. The other speakers are for the mid range and higher frequencies.
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Friday, March 6th, 2015 AT 8:07 PM

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