Amp gauge wiring? (U14)

Discussion in 'Electrical Systems' started by Dave Nelson, Sep 22, 2009.

  1. Dave Nelson

    Dave Nelson Veteran Member Gold Member

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    I removed my U14 gauge cluster to do some work on my gauges, and also see why my amp gauge does not operate. I found the original plug missing from the amp gauge, and in it's place were 2 spade terminals, 1 was going to a ground {not original] and the other going into the harness (dark brown). The car is a 1970.Does anyone have a pic of the original plug so I can see what color the wires are , also maybe a wiring diagram as I found nothing shown in the assembly manual.
    Thanks Dave
     
  2. ezcruisn71

    ezcruisn71 Veteran Member

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    Last edited: Sep 22, 2009
  3. Dave Nelson

    Dave Nelson Veteran Member Gold Member

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    Rick, the wires that I am looking for do not go into that connector. They go into the engine compartment. I need to see a pic of the plug on the amp gauge to idenify the colors.
    Thanks Dave
     
  4. ezcruisn71

    ezcruisn71 Veteran Member

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    Last edited: Sep 22, 2009
  5. Z20AINT

    Z20AINT Veteran Member

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    One wire goes to the horn relay / alternator. The other wire goes to the starter solenoid. The amp gauge really measures the voltage drop between the alternator and the battery. Kinda worthless in my opinion. Dump it for a voltage gauge.
     
  6. Orange71

    Orange71 Veteran Member Lifetime Gold Member

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  7. Cardinal

    Cardinal Veteran Member Lifetime Gold Member

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    Be VERY careful with amp gauges as I've seen some awful electrical fires caused by them. A volt gauge is much safer in the long run.
     
  8. Gary S

    Gary S Administrator Lifetime Gold Member

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    The factory amp gauge isn't a true amp meter. It is a low voltage voltmeter instead that measures the difference in voltage between the two points mentioned above. You don't have to worry about it anymore than you would worry about the meter marked volts.
     
  9. Dave Nelson

    Dave Nelson Veteran Member Gold Member

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    Thanks for the replys fellas, I didn't think there should be a ground wire on one side of the gauge as I found it. Now to see if the gauge is still good, and trace the correct wires, if I can locate them.
     
  10. tom3

    tom3 Veteran Member

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    Two wire plug with a black and a black/white stripe wire. Complicated setup for this in the 70. I think the gauges lose their sensitivity over time and quit working even when wired correctly. I finally gave up and put a volt gauge on my 70. If your gauge has been hooked up wrong it's probably toast.
     

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