Wiring questions, 12 volt switch power source?

Discussion in '1974 - 1978 Mustang II Talk & Tech' started by Gael, Mar 17, 2004.


  1. Gael

    Gael Founding Member

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    My dad is asking me to find out where II's have a "12 volt switch power source". Does anyone know? We need it to hook up the electric fans and electric fuel pump.

    Thanks for any information.
  2. mustang_mattie

    mustang_mattie Founding Member

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    Wiper fuse is one that I use.

    -Mattie
  3. 77sleeper

    77sleeper GO BUCS! Founding Member

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    :stupid:

    mee to :nice: tap it to a relay then power a buss, you can have as much power as your alt can give

    BTW post the RAD pics here
  4. COBRA 7

    COBRA 7 Founding Member

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    You need to switch a relay on and off to power fans. DO NOT WIRE THEM THROUGH THE KEY SWITCH DIRECTLY. All the amps that the fans draw will burn out the key switch. I found this out by running fog lights without a relay. :flag:
  5. 77sleeper

    77sleeper GO BUCS! Founding Member

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    hey, that is what I said
  6. JonDawg

    JonDawg Mstng2 supplied me with my pair Founding Member

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    This might sound really dumb, but where should the relays be mounted, and (shhhh) . . . whats the best way to wire them?? (so it looks good) :shrug:
  7. 77sleeper

    77sleeper GO BUCS! Founding Member

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    placement is a personal preference issue

    here is a rough sketch ignore the polarities

    Attached Files:

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