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ford 600 wiring instructions for 1 wire alternator

K

kleine39kermit

Member
Set me straight, On my Ford 640, 1 wire alternator Now 12 volt negative ground, Does the wire off the battery (starter solenoid) go to the positive side of the ammeter? And the wire from the alternator and ignition switch go on the negative side?
The way it was wired its the opposite of this and I would think the voltage would be reversed.
 
Is your ammeter currently working correctly? If yes, no need to switch anything. If your ammeter is not working correctly, switch the wires at the ammeter. Link is to a site with various wiring diagrams including a 601 with one wire alternator and ammeter. I know your 640 does not have a fuel gauge, but the wiring for the ammeter is the same.
Ford 12 wiring diagrams
 
(quoted from post at 20:09:40 04/08/19) Set me straight, On my Ford 640, 1 wire alternator Now 12 volt negative ground, Does the wire off the battery (starter solenoid) go to the positive side of the ammeter? And the wire from the alternator and ignition switch go on the negative side?
The way it was wired its the opposite of this and I would think the voltage would be reversed.
Click to expand...
s Mitch said, if working correctly, what are you doing? Trying to fix it until it IS broke?
P.S. ammeters don't care about voltage, they care about amperes.
 
(quoted from post at 13:20:34 04/09/19) But it does matter in which the direction the amperage flows, whether it shows positive (charging)m or negative (discharge)
Click to expand...
f it reads backwards, simply reverse the wires, post to post.
 
The ammeter is an indicator, not a controller.

Changing ammeter connections will only change the direction current flows through the meter and hence it's indication, it will not change the direction current flows through the circuit.

As stated, Ignore the + and - and connect it to indicate toward positive when running and charging
 
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