[b13rm4n]

I have a 2002 GTS and everywhere i look (newcelica and celicahobby) for wiring diagrams all i find is ones that have pink wires from the harness. Nothing about the brown wires. My car has no pink wires or violet. Sorry if this is a newbie question. Im just looking for the correct wire diagram.:/::/:
http://www.celicahobby.com/forums/ubbthreads.php/ubb/showflat/Number/57398/site_id/1

 

[ucfbaseball24]

Nothing about the brown wires. My car has no pink wires or violet.

Where are you talking about? B/c there shouldn't be pink or violet wires at the radio harness. I'm assuming you're talking about your driver side front speaker wire in the door.
You should have the premium 8 speaker system with an amp, for additional help, it would be a lot easier if you could get a picture of the harness you're talking about.

 

[b13rm4n]

Update

I am trying to install a new headunit and I cant find any correct diagram for the Toyota wires. I'm not to good with radios either so I took it to a friend. That's why the wires are snipped.:dspnt:
Stock Radio Wires

Pioneer Headunit Wires

 

[Kevins_234]

Don't u have to buy a stereo wiring harness?:shrugs:

 

[b13rm4n]

Don't u have to buy a stereo wiring harness?:shrugs:

My friend tried skipping that part and was going to just connect the wires. I was just letting him do his thing but we couldn't find a correct diagram.:smug:
I still have the stock harness, however its no connected to the other wires obviously.:roflno:

 

[ucfbaseball24]

NEVER CUT THE STOCK HARNESS!!!!!

Unless nobody makes a wire harness for the car. Your problem now is that you have cut harness and the only 2 methods of getting your radio to work and sound to come out of the speakers are to 1) use an amp integration harness (Metra 70-8113 I believe) which would require the stock harness to be reattached or 2) get an amp bypass harness (metra 70-8118, I might have the numbers switched between this one and the integration harness) the amp bypass harness will plug all the speaker wires going to the amp into this harness which will then run to your radios green, purple, white and grey wires.

As far as your situation, your best solution is to either run an external amp or bypass the oem one. In that case you would only need the constant power, switched power, and ground from the stock harness your friend cut. You would wire it up like this.

Stock harness------> radio wires

Blue w/ yellow stripe -----> yellow
Thinner grey------> red
Thicker brown------> black

That's all you need, cap the rest. Then like I said run RCA's to an external amp or go to an audio shop, ask for about 6 feet of multi-wire and make your own amp bypass (since the ones metra makes are kinda hard to find and only on the Internet)

If you do decide to go with your own amp bypass let me know, I can check my car for the color code at the amp

 

[b13rm4n]

Oh great..:marky:
I just need to learn to do this myself. Anyway I think I have an external amp that's connected to my sub. Im really not sure. Just let me know what I need to get for this radio to work. And ill get to it. Thanks I appreciate it.

AMP?

HU:

Thanks!:cheers:

 

[wickush]

If you can put the harness back to stock you can pay 8 bucks for a nifty plug that has the same color wires as your head unit.

 

[b13rm4n]

I though of that and I bought a harness from the store and I didn't fit the harness. So I might have got the wrong one.

 

[wickush]

Yea it says toyota on it. Worked on my 2002 gt when i installed my kenwood DD touch screen

 

[ucfbaseball24]

If you can put the harness back to stock you can pay 8 bucks for a nifty plug that has the same color wires as your head unit.

I already mentioned that, but since there's a 99% chance you have the stock amp (I think all of the gts's came with it but I'm not sure) that harness would only be good for the 3 wires I told you about in my last post. GO AND CHECK TO SEE IF YOU HAVE THE OEM AMP! It's behind the glove compartment, you can slide in the passenger side upside-down and head first and you should be able to see it.

2nd picture shows the harness that contains the speaker wires that you need to connect to the headunit.

What you need to finish the install:
6 feet of multiwire
Wire strippers/crimpers
Butt connectors (since I'm assuming you've never soldered wires)

How to install:
Disconnect the negative terminal of the battery
Connect the Blue/yellow wire to radio's yellow wire
Connect thin grey wire to radio's red wire
Connect thick brown wire to radio's black wire
Connect the green wire from the multiwire to the green wire of the radio
Connect the green/black wire of multiwire to green/black wire of radio
Continue for all 4 sets of speaker wire
Connect the other end of the multiwire to the speaker wires in the harness (circled in the 2nd picture) at the amp.

I'm not certain if the colors are the same on the amp side of the speakers, but if they are the same as at the speakers you'd want to connect them like this:


SPEAKER WIRES
Radio wire color----->Multiwire color (color/stripe)------> Amp harness color
White (LF+)-----> White (LF+)------> Pink
White/black (LF-)-----> White/black (LF-)-----> Purple
Grey (RF+)---->Grey (RF+)-----> Light Green
Grey/black (RF-)---->Grey/black (RF-)-----> Blue
Green (LR+)---->Green (LR+)-----> Black
Green/black (LR-)---->Green/black (LR-)-----> Yellow
Purple (RR+)---->Purple (RR+)-----> Red
Purple/black (RR-)---->Purple/black (RR-)-----> White

Radio Harness (the one you cut)
Harness color/stripe----->Aftermarket radio harness color
Constant 12V: Blue/yellow-----> Yellow
Switched 12V: Thin grey-----> Red
Ground: Thick brown-----> Black

 

[b13rm4n]

Im pretty positive i have a stock amp but i will double check when i get home.

 

[b13rm4n]

Yea it says toyota on it. Worked on my 2002 gt when i installed my kenwood DD touch screen

wickush said that too lol. Not me.

 

[b13rm4n]

So lets say I reattach the harness with a solder-less connection. What steps would i need to take it from there in order to get this HU working. Where can I find this Bypass harness?:/:

 

[wickush]

I got mine at wally world. As i said mine is a gt and im not a guru at this. Idk why you would have to bypass the amp. If the connector doesnt work just take it back.
If anyone knows more about why you have to bypass please explain

 

[b13rm4n]

I got mine at wally world. As i said mine is a gt and im not a guru at this. Idk why you would have to bypass the amp. If the connector doesnt work just take it back.
If anyone knows more about why you have to bypass please explain

The one at wally world dosent support JBL systems. GTS's from 2000-2002 came stock with a JBL system. 2003+ is optional. So my GTS harness looks different then your GT harness.:blah:

 

[Kevins_234]

Yea at best buy they had a hard time finding my harness for the radio

 

[ucfbaseball24]

I got mine at wally world. As i said mine is a gt and im not a guru at this. Idk why you would have to bypass the amp. If the connector doesnt work just take it back.
If anyone knows more about why you have to bypass please explain

You have a GT and don't have the oem amplified system. The OP has the amplified system so not only is the harness a different size, it also leads to an amp and not just straight to the speakers.

To keep it simple for you guys, the amp simply takes a low level signal (rca cable) and amplifies it to a high level signal (speaker wire). The factory has modified the wiring and made the speaker wire feed low level instead of rca cables. The reason you can't just wire them up to the wires coming out of the back of an aftermarket unit is b/c those wires in your aftermarket radio are high level out not low like the oem wires. That is why if you want to use them, you have to have a harness that converts the low level speaker wires to low level rca cables.

So lets say I reattach the harness with a solder-less connection. What steps would i need to take it from there in order to get this HU working. Where can I find this Bypass harness?

If you are wanting to bypass, then you don't need to reattach the radio harness, just wire it up with the code I provided above

Radio Harness (the one you cut)
Harness color/stripe----->Aftermarket radio harness color
Constant 12V: Blue/yellow-----> Yellow
Switched 12V: Thin grey-----> Red
Ground: Thick brown-----> Black

Then run the multiwire to the amp or use a bypass harness found HERE and connect the same color wires together with the wires from your headunit and you are done.

 

[ucfbaseball24]

at best buy

That's your problem....

 

[wickush]

That's your problem....

Loled. Thanks for clearing that up i was unaware that you couldnt run high level sound into an amp. I asumed it would just add its power to the headunits output reaulting in more amped up sound..