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Identifying a wire

Discussion in 'Electronic Basics' started by steamer, May 30, 2008.

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  1. steamer

    steamer Guest

    OK I'm putting an old radio in a new truck and the wiring harness
    had to be slightly different. Bottom line: I've got about 5 extra wires
    coming out of the radio. Now one of them powers the panel lights but I don't
    know which one or how much power it needs. How would someone go about
    'tickling' the wires with increasing voltage (up to 12 one supposes but
    maybe less?) to determine which one controls lighting?
  2. Lord Garth

    Lord Garth Guest

    I'd start by looking up the radio model, maybe there is a wiring guide
    I have also seen ready made harness adapters in the stores.
  3. Lord Garth

    Lord Garth Guest

    An old radio wouldn't have that capability...

    There are likely leads for:
    power (memory)
    switched power
    dial lights
    speakers (x4)
    antenna in
    antenna motor
    ground (x5)
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