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Thread: Lost 12V power after rewire. Help!

  1. #1
    Constant Bitrate
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    Lost 12V power after rewire. Help!

    I've seem to have lost my 12V power going to my headunit sometime during a rewiring project.

    Background:
    2000 Ford Mustang, aftermarket Kenwood head unit installed by Best Buy.

    What I did:
    I wanted to tap the 12V wire to power a mobile monitor. However, sometime during the process I lost power from the factory harness. Now I can't power either the monitor or the head unit, together or separately. I've checked voltages with a multimeter.

    What I've done since:
    I've checked all the fuses in the passenger compartment. I looked up my fuse box diagram and swapped out any fuses that were associated with the radio.

    Any ideas on what happened?

  2. #2
    Variable Bitrate Fox_Mulder's Avatar
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    Fuses in the engine compartment?
    Fox Mulder
    2004 Toyota MR2
    Intel Dual Core 2.0Ghz 1Gb DDR2 160GB SATA2 M4ATX Xenarc 700TSV TS BU353 DiNovo Mini Car2PC ODBII Bluetooth HF 16x2 Character LCD

  3. #3
    FLA gospeed.racer's Avatar
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    Check all the butt connectors and see if a wire pulled out? I know how some of those "pro's" install, and it makes me sick. If no fuses are blown, there is a good chance something simply pulled out. Look in the areas that the installer would have messed with.
    2005 Ford Focus ST

  4. #4
    Constant Bitrate
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    Quote Originally Posted by gospeed.racer
    Check all the butt connectors and see if a wire pulled out? I know how some of those "pro's" install, and it makes me sick. If no fuses are blown, there is a good chance something simply pulled out. Look in the areas that the installer would have messed with.
    Checked the butt connectors myself. In fact, I redid the butt connectors on the 12V and the ground because theirs was sloppy. At least theirs worked.

  5. #5
    Constant Bitrate
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    Quote Originally Posted by Fox_Mulder
    Fuses in the engine compartment?
    I'll take a quick peek, but I'm not sure if there are any fuses there that are connected to the radio.

  6. #6
    Newbie John M's Avatar
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    Nov 2004
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    Milledgeville, GA
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    Are you missing constant 12v or switched 12v? If it's constant, you probably blew the dome light fuse.
    2005 Subaru Legacy GT
    Status: 40% - starting install

    AMD Sempron 3100, Biostar K8NHA PRO mobo, 512 meg DDR, WD 200 gig SATA, Opus 150, Xenarc
    JBL GTi 6.5 fr, JBL 5.25 rr, (3) JBL 75x2 & 1 1200x1 amps, PA MOFO 12 sub

  7. #7
    Constant Bitrate
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    I went to Wal-Mart and picked up a fuse checker. Turns out one of my fuses in the engine compartment was bad, I just couldn't see it at first. Thanks for all the help.

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