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captaindana 
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Joined: 14 Sep 2009
Location: Fort Plain, NY
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 Topic: CA 12 v conversion woes
Posted: 13 Jan 2023 at 7:38pm |
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Hey guys I put a new Denso one wire alternator new 12v battery new wiring new voltmeter new internal resistor coil tractor runs perfect does not show a charge I unhooked the wire coming out of the alternator and just ran motor wide-open and tested the alternator and nothings coming out is that normal with nothing hooked to it? Steve please I need a simple diagram. I have push/pull sw, volt meter, and pull rod to starter. Help please😂🤔. Thanks!
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Blue Skies and Tail Winds
Dana
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steve(ill)
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Joined: 11 Sep 2009
Location: illinois
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Posted: 13 Jan 2023 at 8:53pm |
one wire alternator should have one BIG wire ( maybe 8- 10 gauge) running from the BIG terminal to the Battery + terminal, or the other end of the + terminal at your starter lug..... Should be HOT all the time.. You need POWER to the alternator, and adequate RPM to get the alternator to Charge... If you have a volt meter, see that you have 12v at the alternator...
you have a VOLT METER, so it goes in parallel with the alternator, not in series.. will get a simple picture.
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steve(ill)
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Location: illinois
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Posted: 13 Jan 2023 at 9:07pm |
...here is a basic drawing.. --BIG wire from the alternator straight to the battery + or starter + cable --you have some type of ON- OFF switch to put power to the coil --the voltmeter gets it power from the OUTPUT of the switch --the other side of the volt meter is grounded or goes to the - battery post --the ON-OFF switch has one HOT wire input that comes from the + bat or + starter cable --you should read 12 volts at the starter lug and the alternator lug all the time, engine off
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Like them all, but love the "B"s.
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steve(ill)
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Posted: 13 Jan 2023 at 9:10pm |
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If you have a MAG then your "OFF" switch will ground the mag... You still need an ON or POWER switch that puts power to the volt meter .... ?? right ?
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Like them all, but love the "B"s.
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DaveKamp
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Joined: 12 Apr 2010
Location: LeClaire, Ia
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Posted: 13 Jan 2023 at 9:27pm |
Dana- make absolutely POSITIVELY... that there's a good return (ground) path from the case of the alterator, to the battery's ground...
It would be a good idea to take a jumper cable from that case, back to the grounded battery post... at least, for a test.
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Ten Amendments, Ten Commandments, and one Golden Rule solve most every problem. Citrus hand-cleaner with Pumice does the rest.
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Dakota Dave
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Joined: 12 Sep 2009
Location: ND
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Posted: 13 Jan 2023 at 11:30pm |
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you said you ran it with the wire disconnected. It won’t produce any voltage with the wire unhooked it needs a battery hooked for it to energize. The one I had also would not energies at idle. I needed a 1000 Rpm for it to start charging. Once energized it charged fine at idle.
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captaindana
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Joined: 14 Sep 2009
Location: Fort Plain, NY
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Posted: 14 Jan 2023 at 4:35am |
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Thanks to all whom replied…after another cup of coffee I’ll get on this! I’m shocked the ammeter and voltmeter are hooked differently!
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Blue Skies and Tail Winds
Dana
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AaronSEIA
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Joined: 11 Sep 2009
Location: Mt Pleasant, IA
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Posted: 14 Jan 2023 at 5:52am |
From what I understand, an ammeter simply is a "pass through" gauge showing the amp load pulled where a volt meter is measuring battery/charging volts. Two different gauges with two different purposes. AaronSEIA
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WF owner
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Location: Bombay NY
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Posted: 14 Jan 2023 at 6:34am |
Think of water.
An ammeter is like a water meter that measures how much water is flowing through it or amps. That's why many suggest changing from an ammeter to a voltmeter when changing to an alternator. An alternator charges at a much higher rate than a generator and most ammeters are not designed to handle the increased charge rate and could be a fire hazard.
A voltmeter is like a pressure gauge monitoring the pressure or volts. it just monitors. Nothing is passing through it.
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captaindana
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Posted: 14 Jan 2023 at 7:45am |
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Holy Moley SUCCESS. FINISHED UP (for the 4th time) wiring and she charges nicely! WF thanks for the great understandable explanation! Steve as always thanks for the diagram and explains🤣! Thanks Dave and Dave and Aaron, Now I’ll roll her out of the warm shop (new to me) and drive in the next victim. 😮Thanks! Dana
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Blue Skies and Tail Winds
Dana
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steve(ill)
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Location: illinois
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Posted: 14 Jan 2023 at 6:01pm |
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I think it is very common mistake to remove the old AMP meter and install a VOLT meter with the same wires.... As WF said, that dont work... but common mistake.
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Like them all, but love the "B"s.
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