Ford amp gauges

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  #1  
Old 08-31-05, 02:46 PM
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Ford amp gauges

Maybe a silly question but I've had many Fords over the years, starting with 1954 and I've never had one that had an amp gauge that seemed to register anything. They just seem to sit there, right in the middle. Other cars gauges go up when charging and down when discharging. The Ford's does nothing.

Is this the way it is supposed to be? If so, why?
 
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Old 08-31-05, 03:11 PM
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Are you sure that it is an amp gauge and not a voltage gauge. Sure sounds like a volt meter but I don't have a Ford to compare.
 
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Old 08-31-05, 07:44 PM
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I know what KEWeyand is talking about. I believe most fords call the gauge an alt gauge. Unless the altenator quits I don't belive they move. I have a 51 flathead with a genarator and the factory gauge for it moves like you would expect one to. Don't remember how the 60's genarator gauges were but all the fords I've owned with alternators make you think the gauge doesn't work.
 
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Old 08-31-05, 08:19 PM
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KEWeyand Unconfuse me please. Does this gauge have numbers like -40 on one side and + 40 on the other or does it have numbers like 10 13 18, or is it just colored like red on the left half and green on the right half?
The first example would be typical for an ammeter; the second example for a voltmeter; and the third example could be either.
 
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Old 09-01-05, 08:11 AM
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If not mistaken most of the ford trucks have a gauge with 'D' and 'C' on opposing sides.
 
  #6  
Old 09-01-05, 08:22 AM
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They are amp gauges; the problem is they are not amp gauges in the true sense. A true amp gauge is wired in series in the circuit, all electrical power except for the starter would go through it. So there fore you would need maybe an 8-12 gauge wire coming into the gauge and the same returning back out to the power distribution point.

On Fords what they do is use a “sensor type” system with a 16-18 gauge wire to try to read the charging condition and display that on gauge. The only time I’ve seen mine move (’70 Mustang) is when the battery is very low and it will move about two needle widths.

I have had many Fords over the years and they all work the same way.
 
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Old 09-01-05, 11:20 AM
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Thanks Larry. I learned something new. Love this site.
 
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