How to remove radio from 1990 cs corolla - 1990 Toyota Corolla

Vehicles covered: 1990 Toyota Corolla 1.6L EFI DOHC 4-cylinder

For a 1990 4-cyl Corolla, the max Gross Trailer Weight spec is 2000 lbs.,
with a max ****** weight of 200 lbs.

Reference:
http://www.autozone.com/autozone/parts/1990-Toyota-Corolla/Trailer-Hitch/_/N-igztdZa8nzd

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.

To install

> 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.

Forgot to conect hazard switch or this is stuck, try cycle it a few times a litle hard if not check conector may not be pushed all way in. good luck

you've got a possible blockage in the head or block.

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

the plastic frame around it should snap out with a flat head screwdriver to get access.

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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If Biggy1 has described it right, I think when you remove the WIRE to the spark plug ( not the plug itself ) and oil jumps out, there is a cylindrical seal that needs replacing and one does not need to even remove the cylinder head.
I have the same problem with my corolla. On the other hand if Biggy meant when removing the SPARK PLUG oil was on the contacts....

Hello, on most corolla's I have done,the black plastic shroud unscews from around the speedo/dash cluster and also includes the hazard/breakdown switch.The black plastic then comes out with stereo attached(usually)so be careful not the crack the plastic surround.In most cases you will not need to remove steering wheel but it will give more room to work with,if it is removed.Hope that helps.