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1948 - 1956 F1, F100 & Larger F-Series Trucks Discuss the Fat Fendered and Classic Ford Trucks

Charge indicator light?

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Old Jun 25, 2020 | 06:58 AM
  #1  
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Charge indicator light?

We put a one wire alternator on a 1956 F350 express; I know exactly how this
light works with a generator. I tried all my tricks with no luck with alternator. My
research comes up with some kind of monitor to sense voltage like if voltage
drops under 12vts the light comes on and goes off over 12vts (charging) is this
true and who sells them. Or I just may go with oil and amp gauges? Any one have
any luck with this? sam
 
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Old Jun 25, 2020 | 07:51 AM
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I've converted a few Ford tractors to the one-wire GM alternator and installed a voltmeter to monitor electrical system health.
 
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Old Jun 25, 2020 | 11:17 AM
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From: Bothell & Silverdale, WA
Originally Posted by big job
We put a one wire alternator on a 1956 F350 express; I know exactly how this
light works with a generator. I tried all my tricks with no luck with alternator. My
research comes up with some kind of monitor to sense voltage like if voltage
drops under 12vts the light comes on and goes off over 12vts (charging) is this
true and who sells them. Or I just may go with oil and amp gauges? Any one have
any luck with this? sam
You can't get there from here because you don't have access to the sense circuit (see diagram).




If you have a power outlet (aka cigarette lighter), one of these works quite well.

https://www.harborfreight.com/12-vol...iABEgKQP_D_BwE
 
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Old Jun 25, 2020 | 05:32 PM
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Also bear in mind that if your alternator is rated over 60 amps you will need an externally shunted ammeter, that is if you go the ammeter route instead of a voltmeter.
 
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