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  •  » Instrument Cluster power question

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    1/09/2021 5:49 PM  #1

    Mark in CA
    FYI FORD Member

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    From: Wickenburg, AZ
    Registered: 4/01/2013
    Posts: 52

    Instrument Cluster power question

    I'm installing Classic Instrument gauges in my '65 FB, using Painless wiring harness.  The gauges need to be connected to a 12VDC switched power source and suggests using a dedicated 5A fuse.  The power wire from the "I" terminal of the gauges is BLK/GRN.  Where can I get switched power and where would I put the fuse? From what I gather, I do not need the Constant Voltage Regulator.  Is the CVR switched power and if so, would I connect to the light green/red wire from "IN" terminal or the BLK/GRN wire from the "OUT" terminal? 
     

     

    1/09/2021 6:28 PM  #2

    MS
    Forum Originator

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    From: Canyon Lake, Texas
    Registered: 1/24/2013
    Posts: 12,263

    Re: Instrument Cluster power question

    I would just eliminate the cvu and use the 12v switched power that normally feeds it.  You can verify on your fuse block, but my sometimes failing memory says there is a fuse for it.  Better verify!

    Money you enjoy wasting is NOT wasted money... unless your wife finds out.
     

    1/09/2021 6:52 PM  #3

    Mark in CA
    FYI FORD Member

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    From: Wickenburg, AZ
    Registered: 4/01/2013
    Posts: 52

    Re: Instrument Cluster power question

    Perfect! I’ll check the the fuse block. Thanks MS

       •Thread Starter
     

    1/09/2021 9:34 PM  #4

    wsinsle
    Senior 24-7 FYI Addict

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    From: Belle Vernon, PA
    Registered: 4/01/2013
    Posts: 1,703

    Re: Instrument Cluster power question

    You would use the 'in' wire. On the original wiring, it is switched but at first glance I don't think it is fused. (I don't have time to dig in I have to leave to pick up brother at airport) You say you are using a Painless wiring harness, is the whole car rewired or are you using a painless harness for just the Gauges. If the whole car is painless I'd bet it is fused.

    If this forum can't fix it, it isn't broke.
     

    1/10/2021 11:59 AM  #5

    BobE
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    From: White Plains, NY
    Registered: 4/04/2013
    Posts: 2,650

    Re: Instrument Cluster power question

    The gauges are fed from the 'stud' (wire #297) on the rear of the ignition switch and is only "hot with the ignition switch in the "On" and "ACC" positions.  This circuit is not fuse protected from the factory.

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

     

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