Thread: 98 GTP radio wiring

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  1. #1 98 GTP radio wiring 
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    98 GTP SC HUD 4DR

    I cannot reconcile the wiring in my car with any wiring diagram, and in fact have a couple of extra wires I can't account for. I only mention this because it is entirely possible one or more of these wires may not go to the stereo, and since I have other issues, I want to make sure one of these wires doen't belong elsewhere

    I have positively identified BLK/WHT, DK BLU, LT BLU, ORG, BRN, YEL, BRN/WHT, GRY/BLK wires. I am left with a LT GRN, DK GRN, DK GRN, TAN, YEL, DK BLU, DK GRN, BLK, and GRY. The 1st 4 of the 9 left should be front speaker wires but I could get no ohm reading so I suspect both speakers are blown.

    So here's what I have:
    BLK/WHT GROUND VERIFIED
    DK BLU RR + VERIFIED
    LT BLU RR - VERIFIED
    ORG BAT/MEM VERIFIED
    BRN LR + VERIFIED
    YEL LR - VERIFIED
    BRN/WHT DIMMER VERIFIED
    GRY/BLK LIGHTS ON VERIFIED
    LT GRN SHOULD BE RF +
    DK GRN SHOULD BE RF -
    DK GRN SHOULD BE LF -
    TAN SHOULD BE LF +
    YEL SHOULD BE ACC/PWR ON - NO VOLTAGE PRESENT - PROBLEM
    DK BLU UNKNOWN
    DK GRN UNKNOWN - 12V PRESENT WHEN IGN SW IS ON
    GRY UNKNOWN
    BLK UNKNOWN - This wire has a 1-pin connector and is folded and taped to the wire harness in the back, not with the other wires and also has 12v present with ign sw on

    There are also 3 wires on a separate connector I presume go to the
    steering wheel controls. There is a LT GRN, DK GRN, and TAN wire there.

    If anyone can help with this it would be great. Maybe one or more of these unknowns are responsible for the other problems. Thanks.
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  2. #2 Re: 98 GTP radio wiring 
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  3. #3 Re: 98 GTP radio wiring 
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    Thanks, I have a Haynes Manual.
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  4. #4 Re: 98 GTP radio wiring 
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    Old thread ... similar subject. I have a 2000 and pulled out the radio to install a new amp and HU. Until I save some more $$, I planned on reusing the GM speakers.

    I have the power side of the HU & amp working fine but the GM speakers won't play. I re-wired the rears directly off the amp with no luck?? I wired up an old 5x7 i had laying around (came off an F-150) and it worked fine ... so I am pretty sure I had things wired right.

    Does anyone know why the speakers wouldn't work.
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