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  •  » 1965 mustang question on Yellow/ Black routing

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    5/15/2024 2:46 AM  #1

    True74yamaha
    Senior 24-7 FYI Addict

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    From: Salt Lake City
    Registered: 5/07/2013
    Posts: 2,526

    1965 mustang question on Yellow/ Black routing

    Curious where the Yellow/ black stripe wire goes after it passes through the firewall? Is Yellow/ Black stripe wire the same as Green/Red stripe charge wire?

    Last edited by True74yamaha (5/15/2024 3:06 AM)

     

    5/22/2024 6:14 AM  #2

    BobE
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    From: White Plains, NY
    Registered: 4/04/2013
    Posts: 2,597

    Re: 1965 mustang question on Yellow/ Black routing

    The Black-Yellow (#37) enters the interior and is spliced to; the Yellow wire (#21) that goes to the fuse block (#21), and the Black-Orange wire (#25) that goes to the light switch, and to the ignition switch (#37).
     
    No, the Black-Yellow wire (#37) is not the same as the Green-Red wire (#904). The Green-Red wire provides power from the ignition switch to the alternator/regulator when the ignition switch is turned to ‘run’ or ‘start’ position.

    65 Fastback, 351W, 5-speed, 4 wheel discs, 9" rear,  R&C Front End.
     

    5/22/2024 6:21 AM  #3

    TKOPerformance
    Hyper FYIFORD ADDICT

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    From: Newark, DE
    Registered: 12/15/2014
    Posts: 7,449

    Re: 1965 mustang question on Yellow/ Black routing

    A good rule of thumb in automotive wiring is that a red wire is keyed 12V while a yellow wire is constant 12V.  Tracers are typically just used for circuit delineation (i.e. black strip indicates ignition circuit, etc.). 

     

    6/05/2024 10:26 AM  #4

    True74yamaha
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    From: Salt Lake City
    Registered: 5/07/2013
    Posts: 2,526

    Re: 1965 mustang question on Yellow/ Black routing

    Figured it out yellow/black stripe wire is for alt dummy light. Its on the exterior light harness. I believe its an early harnesses with yellow/ blue stripe horn wire. Later harnesses have green/red stripe for alternator and yellow/ green stripe for horns.

    Does anyone here have a 1964 1/2 underdash harness they'd be willing to sell even if it's in horrible shape that's fine I need the firewall connectors.

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