1990 Toyota Corolla Logo
Posted on Dec 19, 2008
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Cut harness from stereo in 1990 corolla dx sedan

While trying to be mcguyver and install an aftermarket radio in the car ive cut the original harness for the car and cant figure out the color codes for the radio...also my interior lights(dash/dome/etc) will no longer come on.

  • Mike Butler
    Mike Butler May 11, 2010

    Cut into a fused wire maybe? Have you got a 12vdc test light, or multimeter?

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2 Answers

Marvin

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  • Toyota Master 85,242 Answers
  • Posted on Dec 19, 2008
Marvin
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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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  • Expert 233 Answers
  • Posted on Dec 19, 2008
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You have blown your Horn/hazard fuse in the under hood fuse box.
do you have any technical experience, do you know how to use a meter or test light?
here is the wiring for your car.. remember to insulate all wires and check the horn/hazard fuse and the radio fuse, also the Dome fuse..Check all fuses JUST to be sure!
Constant 12V+   Blue yellow   Switched 12V+ Gray   Ground    Brown 
Illumination Green 
Dimmer n/a 



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 (-) Whi

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if he had an aftermarket stereo in the vehical then he had to cut the origional harness out of the way. the only solution for this would be to replace with another aftermarket stereo. I know this becaus ei had a ***** of a time trying to install my aftermarket.
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