Factory Radio/CD Not Powering On

[danny_cincy]

Here's my latest issue:
I am trying to install a factory radio/CD changer into my 95 Avalon XL. All of the connections are in, as far as I can see, and it's not powering on. The ECT, Hazard Lights, climate controls are all fine. AND the old P.O.S. aftermarket radio was fine. It still powered on. However, it's junk and so I wanted to put the factory in. Here's the deal though, the owner before me had the aftermarket installed and the wiring looks like it was spliced off of the wiring to the original harness. Either way, the factory radio is not turning on. Does the amp behind the glove compartment affect this as well? I haven't checked it out yet, but would that prevent it from turning on, if the previous owner had disconnected anything there? This is annoying the heck out of me.

[hairball]

Could you use a wiring diagram for that vehicle?

1995-97 Toyota Avalon Stereo Wiring
Constant 12V+ Blue/Yellow
Switched 12V+ Gray
Ground Brown
Illumination Green
Dimmer n/a
Antenna Trigger Black/Red
Front Speakers:
Left Front (+) Pink
Left Front (-) Purple
Right Front (+) Light Green
Right Front (-) Blue
Rear Speakers:
Left Rear (+) Black
Left Rear (-) Yellow
Right Rear (+) Red
Right Rear (-) White

[danny_cincy]

Originally Posted by hairball

Could you use a wiring diagram for that vehicle?

1995-97 Toyota Avalon Stereo Wiring
Constant 12V+ Blue/Yellow
Switched 12V+ Gray
Ground Brown
Illumination Green
Dimmer n/a
Antenna Trigger Black/Red
Front Speakers:
Left Front (+) Pink
Left Front (-) Purple
Right Front (+) Light Green
Right Front (-) Blue
Rear Speakers:
Left Rear (+) Black
Left Rear (-) Yellow
Right Rear (+) Red
Right Rear (-) White

Well, I wasn't sure if I needed to mess with any wiring because the original harness that goes into the factory radio is still there. It's still, or looks like it is, completely intact. That's why I'm confused as to why it isn't powering on and what leads to me to wonder about the factory amp.

[hairball]

Let me know if I can be of any further help. Maybe someone else familiar with your car or stereo with post something more useful.

[hairball]

Does your lighter socket work? It's the same fuse. Easier than laying under the dash.

[danny_cincy]

Originally Posted by hairball

Does your lighter socket work? It's the same fuse. Easier than laying under the dash.

Haha..I haven't checked that fuse yet. I will do that tomorrow when the sun is up. I can't really fathom why the radio won't even turn on either. The biggest concern I have is that whoever installed the aftermarket screwed up the original radio harness when they spliced it. The weird thing is, the aftermarket radio works fine (power-wise) and it's running on what looks to be the same wiring. Would the factory radio not work if it was a blown fuse, but an aftermarket would? My experience in much of this is very limited and I've been reading about it as much as I can for hours and hours, haha.

[Chunkywolf]

The person who installed the aftermarket headunit may have disconnected the stock amplifier. And if i remember correctly, the amp supplies power to the headunit, I'll look it up in a bit and correct my post if i'm wrong.

Edit:

Thread Quote was taken from

White or blue plug at amplifier (output)

FUNCTION / WIRE COLOR

Right Front SPKR + / LIGHT GREEN – this and the next 3 go to new HU

Left Front SPKR + / PINK

Right Rear SPKR + / RED

Left Rear SPKR + / BLACK

Woofer + (7th SPKR) / GREEN/BLACK – missing on mine

Constant 12 Volt Input / WHITE/BLUE – where I drew power

Right Front SPKR - / BLUE – this and next 3 go to new HU

Left Front SPKR - / VIOLET

Right Rear SPKR - / WHITE/BLUE

Left Rear SPKR - / YELLOW

Chassis Ground / BROWN – the ground I used

Chassis Ground / BROWN

Woofer - (7th SPKR) / GREEN/RED – missing on mine

Constant 12 Volt Input / WHITE/BLUE




Gray or light green plug at amplifier (input)

FUNCTION / WIRE COLOR

Remote Turn On / RED – you could do your antenna power here, or where I mentioned earlier

Accessory 12 Volt Input / GRAY – where you get your accessory power

Constant 12 Volt to Radio / WHITE

Beep Input from Radio / BLACK

Left Front SPKR + Input / GREEN

Right Front + Input / RED

Illumination Input / GREEN

Illumination Output to Radio / GREEN

Accessory 12 Volt to Radio / BLACK

Chassis Ground to Radio / BLACK

Signal Ground Input from Radio / BROWN

Mute Input from Radio / BLUE

Left Rear SPKR + Input / WHITE

Right Rear SPKR + Input / YELLOW

So yes, the Amplifier supplies Power to the radio, therefore, if the person who installed the aftermarket system pulled the stock amplifier, you will need to do some heavy rewiring, and need a new headunit

[Chunkywolf]

Originally Posted by danny_cincy

Haha..I haven't checked that fuse yet. I will do that tomorrow when the sun is up. I can't really fathom why the radio won't even turn on either. The biggest concern I have is that whoever installed the aftermarket screwed up the original radio harness when they spliced it. The weird thing is, the aftermarket radio works fine (power-wise) and it's running on what looks to be the same wiring. Would the factory radio not work if it was a blown fuse, but an aftermarket would? My experience in much of this is very limited and I've been reading about it as much as I can for hours and hours, haha.

The fuse is definately a better thing to check for a first step though.

[danny_cincy]

Originally Posted by Chunkywolf

The person who installed the aftermarket headunit may have disconnected the stock amplifier. And if i remember correctly, the amp supplies power to the headunit, I'll look it up in a bit and correct my post if i'm wrong.

Edit:

Thread Quote was taken from


So yes, the Amplifier supplies Power to the radio, therefore, if the person who installed the aftermarket system pulled the stock amplifier, you will need to do some heavy rewiring, and need a new headunit

Alright. Well as far as re-wiring, my experience is even more limited. I'm going to check out behind the glove compartment tomorrow and see what's up with the amp. I'll take pics too and see if you guys notice anything out of the ordinary. I hope this is an easy fix, although I'm beginning to worry it won't be. Thanks for all of your help guys.

[hairball]

I give up on trying to troubleshoot these fancy newer cars and their factory systems. I know very little about them. And I'm quick to admit it. My area of expertise is aftermarket stereo systems, but I can get stereo wiring diagrams for almost any car, any year but only so far back. I've never, ever found a car no matter how new that I could not install a stereo or alarm in, but diagnosing and troubleshooting some of the fancy high-tech systems in new cars can be a nightmare (I'm starting to find out).

This is more of what I'm used to messing with (my last car's system):

http://s254.photobucket.com/albums/h...atus%20stereo/

Good luck! Let me know if it was a fuse, and please check it by either pulling it out or using a fuse tester or MultiMeter and NOT a test light! (Sorry, but I try to stress this point to anyone with airbags.)

[danny_cincy]

Alright guys, here's the update and it's not what I wanted to report. My amp WAS disconnected. The green plug was disconnected and the gray wire coming off of it was snipped and attached to some other orange cables running elsewhere. It was a mess. The blue plug that goes into the amp is nowhere to be found. I'm assuming this is why my bass and all has sounded so terrible for the entire time I've owned the Avy. Either way, I'm not sure what to do next. I don't know if it's possible for me to find another blue plug, even so, I don't know how to wire it. The green one's snipped gray wire is a mystery to me, I don't know what it goes to. I don't know what to do next.

Just a note: The last time I went to Best Buy to get a new set of speakers and have them installed, the tool at car audio install told me he checked my amp the last time I had a speaker replaced and said it "all looked good". What an idiot.