Audio System Wiring Diagram - Toyota Celica Forum
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post #1 of 14 (permalink) Old 04-02-2007, 08:01 AM Thread Starter
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Here are the WIRING DIAGRAM for the sound system in our car. I got this from the dealer 5" thick repair mannual. It was helpful to determine which wires was which. I found that the stock amp will not work with after market Deck. I've also found post of some one got it to work with aftermarket Deck but he/she got it install professionally so I guess enthusias like us wouldn't know the trick to it. It would be great if someone knows the trick and tell us all on here.


Speaker Location


Radio, Cassette, CD, and Amp ====> System 10


Radio and Cassete Without AmpONE UNITS


Radio and Cassete Without AmpTWO UNITS


-----------------------------------------------------------------------------------------------

Here is the list of color for others who prefer the non-diagram instruction


This is for Deck(Radio and Cassete) without Amp (One unit)

Brown --- Ground
Black with red stripe --- Antenna +
Gray --- Accessory
Pink with blue stripe --- Amp + ( to turn on/off amp when radio is on/off)
Blue with yellow stripe --- Battery + and Power antenna Control ( to raise/lower antenna when radio is on/off)
Green --- ILL (+) from Taillight Control Relay - (can't tell u why this is here)
White with green stripe --- ILL (-) to Rheostat - (can't tell u why this is here)
Pink --- Left Dash Speaker (+)
Purple --- Left Dash Speaker (-)
Teal (neon green) --- Right Dash Speaker (+)
Blue --- Right Dash Speaker (-)
Black --- Left Rear Speaker (+)
Yellow --- Left Rear Speaker (-)
Red --- Right Rear Speaker (+)
White --- Right Rear Speaker (-)

----------------------------------------------------------------------------------------------

This is for Radio, Cassette, CD and Amp (Three Units) ====> System 10

Red[/color] --- Battery (+)
[color="#808080"]Gray --- Accessory
Blue with red stripe --- Accessory
Pink with blue stripe --- Amp + ( to turn on/off amp when radio is on/off)
Brown --- Ground
Pink --- Left Dash Speaker (+)
Purple --- Left Dash Speaker (-)
Teal (neon green) --- Right Dash Speaker (+)
Blue --- Right Dash Speaker (-)
Black --- Left Rear Speaker (+)
Yellow --- Left Rear Speaker (-)
Red --- Right Rear Speaker (+)
White --- Right Rear Speaker (-)
Green with black stripe --- Right Door Speaker (+)
Green --- Right Door Speaker (-)
Blue with red stripe --- Left Door Speaker (+)
Blue --- Left Door Speaker (-)

These set of wires are group together inside a gray platic shield
Black --- Front Right Sound (+)
Green --- Rear Right Sound (+)
Blue --- Front Left Sound (+)
Yellow --- Rear Left Sound (+)
Brown --- ???
Red --- ???
White --- Ground
White with back stripe --- Shield

-----------------------------------------------------------------------------------------------

I know i am not 100% accurate. You are more than welcome to correct it. I'd love to have it 100% correct for future referrence. If these pics are not very clear PM me and i'll e-mail u the actual pics so you can print them off your comp.

Also, if you need to replace your 8" sub on your doors, aftermarket speakers will be too thick to fit in side the stock box. You can either downgrade them to 6 - 6.5" with spacers or you can cut a little bit of the back end of the box off. I did it without removing the plugs to the speakers and the wiring system. For 8" after market speaker spacer, i found something that worked like a charm and cheap. It's call "Backer Rod" 1/2" thick by 20 feet. I got it from Home Depot for like $3. Then you need longer screws. The backer rod act as the spacer and cushion for your new 8". They also did not protruded too high so that you can't put your door panels back on.

Other than that Good Luck and Have Fun
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post #2 of 14 (permalink) Old 04-02-2007, 12:59 PM
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You can use an afternarket deck with the system 10 amp and speakers...why the **** wouldn't you be able to?
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post #3 of 14 (permalink) Old 04-02-2007, 07:09 PM
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Its not a good idea, sence the system 10 headunit was made to power a amp and has a low voltage output putting a aftermarket radio with a higher voltage causes alot of issues.
The signal going to the amp is much greater then its designed to get.
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post #4 of 14 (permalink) Old 04-03-2007, 04:12 AM Thread Starter
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QUOTE (Gyotar @ Apr 2 2007, 09:59 AM)
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You can use an afternarket deck with the system 10 amp and speakers...why the **** wouldn't you be able to?[/B]
like i mention... i am a noob when it comes to wiring car audio system... i followed the diagram and it didn't work for me so... if you can get it to work tell us the trick man...
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post #5 of 14 (permalink) Old 04-03-2007, 06:16 AM
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the input is also sharing comon ground on the amp
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post #6 of 14 (permalink) Old 04-03-2007, 09:36 PM
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I wrote a whole long post that was lost due to this site going down or my internet whatever lol...

Long story short. Buy the wiring harness from Best Buy, wire it to the deck harness. Plug each end in and presto working deck with system 10. If you need further help you need but ask.
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post #7 of 14 (permalink) Old 04-04-2007, 02:24 AM Thread Starter
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QUOTE (Gyotar @ Apr 3 2007, 06:36 PM)
Quote:
I wrote a whole long post that was lost due to this site going down or my internet whatever lol...

Long story short. Buy the wiring harness from Best Buy, wire it to the deck harness. Plug each end in and presto working deck with system 10. If you need further help you need but ask.[/B]
well, i guess it is easy if you already have the system 10 installed. My celi doesn't have the system 10 so i had pretty wire from scratch. Even though there are plugins for the door speakers, i couldn't find for the life of me the other ends where it goes into the amp. I found the lines going out of the door and into the kick panel then i lost them from there. any idea? In the mean time i have the door speakers run off the tweeter line.
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post #8 of 14 (permalink) Old 04-04-2007, 06:07 AM
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Does that harness have preouts? or does it hook up to the speaker wire outputs of the amp?
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post #9 of 14 (permalink) Old 04-04-2007, 06:30 AM Thread Starter
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QUOTE (jhull @ Apr 4 2007, 03:07 AM)
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Does that harness have preouts? or does it hook up to the speaker wire outputs of the amp?[/B]
what do you mean by that? My celi has a salvage title so the stock harness was chopped off. All i can see from the back of the radio are the lines for the dask speakers, front tweeters, rear speakers, and other required lines to have the deck function. I think i am missing the connectors from the right kick panel to the back of the deck. i'll take some pictures tomorrow and post them.
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post #10 of 14 (permalink) Old 04-04-2007, 08:17 AM
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Did the car ever have system 10? I think you should run to Toyota and grab the factory harness. To check what speaks you have leads for use a battery and wait for a popping sound. Once you find a pair, tape it off and tag it if need be.

lol I say get it done professionally if you dont know what you are doing at this point...Sorry but you could screw up a lot of stuff if you dont know what you are doing...
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