72 Sprint aftermarket radio wiring

Discussion in 'Audio' started by borjawil, Sep 4, 2011.

  1. borjawil

    borjawil Member

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    I have a 72 sprint that already has an aftermarket radio harness on it but no radio that came with it. picked up a cheap $20 pioneer super tuner 3 just to get things going. seems the wires used for the last radio were:

    two black wires that are connect to two wires on the harnes that say left front speaker

    blue w/white stripe
    black
    white w/gray
    grey wire

    these other wires were not labeled on the harness already attached so im not sure.

    -I need to know what wire i need for a constant power supply for clock
    -what wire is power when ignition is on
    -what wires for front speakers
    -and which for rear speakers
    - and what to use for the illumination wire

    Ive only connected an aftermarket once to a newer car and not much of an audio guy. As i understand there were on front speakers (maybe only one under the dash) and no rear speakers. car has two rear speakers in the back but not connected but in the space with the wiring harness there are a couple thicker non stock speaker wires im guessing routed to the back of the car for the rear speakers.
     
  2. Craig Selvey

    Craig Selvey Indiana State Rep - MCCI

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    Best to rewire the entire car to work with the Pioneer you just bought. You might be able to re-use some of the wiring...like the speaker wires where they run to the front speakers and back speakers. The aftermarket radio harness will have to go I am afraid.
     
  3. borjawil

    borjawil Member

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    what do you mean rewire the entire car? And I figured the harness on it had to go i have one that came with the pioneer.
     
  4. mojo

    mojo "Everett"- Senior Citizen Supporting Member

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    U can use both the Pioneer harness and the one that's allready going to the rear spk's. If u have the wiring diagram for the Pioneer u can merge the harnessess and not have to pull all the interior panels, carpet, rear seat and anything else that's normally needed to get the wire in the trunk. First, u need to establish what wires go where B4 this is done.
    If u decide to go w/ new wiring, u can also use the wires already there to pull some new wires in their place, possibly eliminating the need to remove some of the stuff mentioned.
    The aftermarket harness has to go - like Craig mentioned. It's of no use w/ ur Pioneer setup.
     
  5. borjawil

    borjawil Member

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    ok thats all fine and dandy. Im just wondering what wires connect where. I know the fat yellow wire is a constant and a red wire is acc. I know which wires on my pioneer need to go to them. However the PO did not use the yellow or red. Im wondering what these other wires he used were for. Im guessing the two blacks that were labeled for the speak is the speaker under the dash. What about the other ones? what are they for? Im guessing the lone black is the ground.
     
  6. borjawil

    borjawil Member

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    i dont have a cigarette lighter but i believe its the fat yellow one. also why did they shove the fuse block up so high under the dash? I can barely get to it. Anyone know which is the radio fuse? Anything else that wouldnt work if it was blown?
     
  7. borjawil

    borjawil Member

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    my flashers work. cant seem to get the radio to come on...if i dont have the constant wire connected it should still come on right? does the antenna plug have to be connected to? theres one solid red wire i see in there that goes to a black box thing and a blue and black i think wires go to it as well.
     
  8. Dave B

    Dave B I like Mavericks!

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    Blue/white stripe is constant power for the cigar lighter.
    Red/blue stripe will be ash tray light, if you don't have one, and your car hasn't been played with too much, it should be taped up inside the dash, with a black plastic plug on the end.
    The thick yellow wire comes from your ignition switch, leave it alone.

    As for the rest? I don't know off the top of my head.
     
  9. borjawil

    borjawil Member

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    okie dokie thanks! i have one black wire thats coming from inside the hole where the radio goes. ill see if i cant follow it and see if its grounded.
     
  10. Dave B

    Dave B I like Mavericks!

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    Is there a black wire, with either a white band, or white dots? Check and see if that has 12v with the key on.
     
  11. Craig Selvey

    Craig Selvey Indiana State Rep - MCCI

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    I wouldn't trust ANY of the previous owner's wiring. Either check it all out, or "chuck" it all out.
     
  12. cactusgrabber

    cactusgrabber Member

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    Your FACTORY wiring for the radio would have originally had a Black wire, that was NOT a ground wire. So be careful to not ground the Black wire, until you are sure this is not the Factory radio harness black wire.

    The factory radios had 2 separate power wires, and NO ground wires, because they were chassis grounded through the radio bracketing and screws.

    Most of the Maverick wiring schematics do not clearly show the radio wiring, so this creates some confusion.

    The original factory Black radio harness wire, would have been the +12 volts DC (switched ACC) power wire, to power the stock radio's amplifier.

    The original Light Blue/ with Red stripe, was the +12 Volts DC power wire, for the radio's light. This comes from the same source wire as the ash tray light. The 2 separate factory power wires for the radio, were fed from 2 different fuses, so keep this in mind too.

    If you are connecting an aftermarket radio, then you might need to create your own ground wire, if your particular radio calls for this.
     
    Last edited: Sep 4, 2011
  13. borjawil

    borjawil Member

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    ok well i have the rear speakers hooked up no front speakers, and theres power to the cd player. I seem to be getting intermitent sound. as in itll be playing then itll stop and im not sure why. i disconnected the rear speakers from the cd player and connected a loose speaker directly so i could see that there was good connection being made and no pinched wiring. and it wouldnt make sound either then a few times randomly sound would come on. im not sure what to look for any ideas?

    also the black wire does seem to be a ground or have power...checked with my test light.

    i have the blue w/ wht as my constant and that checked out with the light
    have a white w/gry i believe that goes on with the ignition.
    And theres a solid grey wire that is a ground checked with the test light.
     
    Last edited: Sep 4, 2011
  14. carshowreject

    carshowreject Member

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    me thinks problem with $20 pioneer..... good radio, but if its used you may not know its history.....
     
    Last edited: Sep 4, 2011
  15. borjawil

    borjawil Member

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    um the sound stop i switched back and forth to the cd or am/fm and nothing from either. I had the guy hook it up to his car and it had no issues what so ever. the only wire im not using on it is a pwr ant wire.
     

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