Question about 1990 Toyota Corolla

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1990 toyota corolla stereo wiring codes i just purchased a sony stereo and i took out the old radio in my 1990 toyota corolla but i cant figure out how to connect the wires i need the color code for matchin the wires ?

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What you need is to buy a wiring adapter for your car.it only cost about 15 bucks and plugs right in to your original plugs that were connected to your factory radio.the great thing about this adapter is that you dont hava to cut your original plug off just in case if you ever want to reinstall your original back.also the wires that go to your new headunit are color coded to match the exact colors that you connect to your stereo.you can't mess your connection up because all you have to do is connect each wire to the right color,tape them up,connect your stereo and you have music with all of your speakers working like they should and without any headaches.i hope this info helps.take care and good luck, manny

Posted on Jul 13, 2010

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1 Answer

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The Toyota Corolla has been around long enough that many owners find themselves needing to replace the factory stereo. Installing a new stereo in the Toyota Corolla gives improved sound and updated features. Swapping out the stereo in the Toyota Corolla takes basic tools and less than an hour. This article covers models from 1990 to 2000.

Open the hood and remove the negative battery cable from the terminal. Apply the parking brake and place the car in "D."

    > Remove the trim from around the stereo by prying with your fingers at one corner. Some early models have two screws at the top of the trim piece to remove first. Allow the trim to hang on the drivers side of the dash if it's connected to the cigarette lighter.
    > Locate and remove the four screws holding the stereo in place. Pull the radio out of the dash and disconnect the wires from the back of the head unit.
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    > Connect the wiring harness adaptor to the original harness and let it hang from the dash. Slide the new stereo into the Toyota radio mounting kit, which is a thin metal cover and secure it per the manufacturer's instructions. Most adaptors have screws to hold the stereo in place, however some have clips, which engage automatically.
    >Plug the wiring harness adaptor and antenna wire into the back of the new head unit and push the entire assembly into the dash. Reconnect the negative battery cable and turn the radio on.
    > Ensure all of the stereo controls and speakers are working. Secure the radio in the dash with the original four screws and replace the trim.

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1 Answer

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1990 Toyota Corolla Stereo Wiring Diagram

Radio Constant 12V+ Wire: Blue/Yellow
Radio Switched 12V+ Wire: Gray
Radio Ground Wire: Brown
Radio Illumination Wire: Green
Radio Dimmer Wire: N/A
Radio Antenna Trigger Wire: N/A
Radio Amp Trigger Wire: N/A
Front Speakers Size: 4′
Front Speakers Location: Dash
Left Front Speaker Wire (+): Pink
Left Front Speaker Wire (-): Purple
Right Front Speaker Wire (+): Purple
Right Front Speaker Wire (-): Light Green
Rear Speakers Size: 4′
Rear Speakers Location: Rear Deck
Left Rear Speaker Wire (+): Black
Left Rear Speaker Wire (-): Yellow
Right Rear Speaker Wire (+): Red
Right Rear Speaker Wire (-): White

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did u know that they make a harness for your car that plugs into your factory harness and then adapts to your aftermarket radio? for the lights, you have blown the interior light fuse, it may be the same fuse as the cigar lighter.Below is your radio wire colors and what they do.
1990 Toyota Corolla Car Stereo Radio Wiring Diagram.
Radio Constant 12V+ Wire: Blue/Yellow
Radio Switched 12V+ Wire: Gray
Radio Ground Wire: Brown
Radio Illumination Wire: Green
Radio Dimmer Wire: N/A
Radio Antenna Trigger Wire: N/A
Radio Amp Trigger Wire: N/A
Front Speakers Size: 4′
Front Speakers Location: Dash
Left Front Speaker Wire (+): Pink
Left Front Speaker Wire (-): Purple
Right Front Speaker Wire (+): Purple
Right Front Speaker Wire (-): Light Green
Rear Speakers Size: 4′
Rear Speakers Location: Rear Deck
Left Rear Speaker Wire (+): Black
Left Rear Speaker Wire (-): Yellow
Right Rear Speaker Wire (+): Red
Right Rear Speaker Wire (-): White
-->

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1 Answer

Toyota corina


1990 Toyota Corolla Car Stereo Radio Wiring Diagram.
Radio Constant 12V+ Wire: Blue/Yellow
Radio Switched 12V+ Wire: Gray
Radio Ground Wire: Brown
Radio Illumination Wire: Green
Radio Dimmer Wire: N/A
Radio Antenna Trigger Wire: N/A
Radio Amp Trigger Wire: N/A
Front Speakers Size: 4′
Front Speakers Location: Dash
Left Front Speaker Wire (+): Pink
Left Front Speaker Wire (-): Purple
Right Front Speaker Wire (+): Purple
Right Front Speaker Wire (-): Light Green
Rear Speakers Size: 4′
Rear Speakers Location: Rear Deck
Left Rear Speaker Wire (+): Black
Left Rear Speaker Wire (-): Yellow
Right Rear Speaker Wire (+): Red
Right Rear Speaker Wire (-): White
-->

Oct 03, 2008 | 1990 Toyota Corolla

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