Question about Toyota Corolla

3 Answers

I am trying to install a sony stereo into my 91 corolla and am having an absolute mission trying to figure out which wires go to what. Do you have any insight or a wiring diagram?

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  • Rachel Dec 10, 2008

    Just had the plugs tested today as there seemed to be no power going to the unit. Aparently only one of the wires is supplying power, shouldnt there be 2? Have wired this same stereo into a subaru and had no problems, so have very basic wiring experience, but this one is turning into a nightmare.

  • Rachel Dec 10, 2008

    Yes, checked with key on and off and only have power with key turned on.

  • Rachel Dec 11, 2008

    Think I know what has happened, and which wire is the main power. Thanks for your help, will be in touch if I have any probs. Cheers

  • Rachel Dec 12, 2008

    Hahaha wish it was, thats one of the first things I checked. Seems I may have chopped a wire I shouldnt have... oops!

  • Brenda Herring Dec 15, 2008

    Installing a Kenwood KDC-MP205 stereo and matched up wires best I could, but no power to deck now.   

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  • Toyota Master
  • 6,674 Answers

Blew a fuse eh ? Ha-ha. Been there, done that. Good Luck

Posted on Dec 11, 2008

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  • Toyota Master
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You didn't by chance miss another small wire harness in there did you? If the harness in the car doesn't have constant power at one of the terminals, then I'd like to know how the old stereo kept proper time & memory (stations). Anyway, if you can't find one with power in off position, then run your own from fuse panel. Unless I'm missing something, stereo's always had one of each. See if you have a blank fuse socket & use it, or splice into cigarette lighter wire if you have that type of socket in dash, but check for power there when key off first. The memory doesn't draw much current so splicing into another wire with constant power in the dash area, shouldn't cause a problem, but if in doubt, run it direct to fuse panel, with low amp fuse should be good. (3amp should be lots)

Posted on Dec 11, 2008

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  • Toyota Master
  • 6,674 Answers

If you go to a stereo installation place, or some auto supply places carry them now too, you should be able to get a plug-in adapter, to go from one to the other & save yourself a nightmare. If not, do you have basic wiring experience & a test light 12VDC?

Posted on Dec 10, 2008

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  • Mike Butler
    Mike Butler Dec 10, 2008

    One wire usually requires constant power for memory, the other will get power when key turned on. 2 different wires in both harnesses usually.

  • Mike Butler
    Mike Butler Dec 10, 2008

    Did you check for power with key turned on & off?

  • Mike Butler
    Mike Butler Dec 12, 2008

    Yup, been there done that one too !! ha-ha. Good Luck, let me know how you make out in the end.

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Car Radio Battery Constant 12v+ Wire: Blue/White
Car Radio Accessory Switched 12v+ Wire: Gray
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Car Stereo Dimmer Wire: White/Black
Car Stereo Antenna Trigger Wire: Black
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91 toyota corolla radio wiring

i checked 2 resources and they match , have you tries this schematic , see if you have a match to your cars wiring . actually this code matched corolla 88-92 , and also i checked all models of corolla and it matched , and from looking at the connector this is the order they are in
lt green
pink
grey
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voilet
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