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WC Amp gauge

J

jim wieringa

New User
I have a bare bones WC. No voltage regulator, no ignition switch. It has a Magneto. I put a one wire alternator on and I want to keep battery
charged. What is the simple way to wire it??? With the Amp gauge included. Thanks
 
You can install your ammeter anywhere along the one wire from the alternator to the battery. Wherever you cut the line put a connector to each end of the wire and attach to the gauge. The idea is simply to measure the flow of the current from the alternator to the battery. If you have accessories such as lights and more and you wish to observe the balance of current being produced and used, you need to connect the supply to your accessories at the first stud where you have already connected the line from the alternator. This way if you have more accessory draw than charge it will show the current coming from the battery to make up the difference. Unless you have a self excited regulator that activates at VERY LOW RPM your WC does not turn over fast enough to start the alternator charging, (governed RPM being so low). I have tried it on one of mine.
 
The advantage of a ONE WIRE Alternator is its ease of wiring, but it may not (like a 3 wire unit) excite until RPM is high.
I assume the Alternator (like most all unless special built) is for NEG ground


The Alternators output stud wires to the LOAD side of the Ammeter (that's its - terminal for NEG ground systems)

Any loads like lights (or ignition if you had a distributor ignition) ALSO wire to the LOAD side of Ammeter where Alternators
output wired.

The Ammeters other SUPPLY terminal wires to the hot ungrounded battery post, often where the big battery cable connects to
the starter switch or solenoids input.

John T
 
Question, I always see we're people make the remark that it won't or may not work because you won't turn enough RPM's to activate the alternator. There must be a reason that I am missing, why not just put a different pulley on the alternator to make it turn faster. I have done the opposite to slow them down on high RPM muscle cars.
 
I have looked at more then one 1 wire alternator and many say right in the paper work that comes with them that they do not excite till doing over 2000RPM. Yes you maybe able to change the pulley to help that but some people do not have that type of stuff laying around so it can be a bit harder to do so
 
I believe the pulley I used was the smallest and it was not enough to kick in at 1400 governed rpm. Let us know if it won't work for you and you can follow other options that give results.
 
GOOD POINT Obviously, a smaller Alternator pulley increases its RPM and its done and one method to help excite a one wire unit at relatively lower (compared to an auto) old tractor RPM's. HOWEVER you need the correct matching bore and/or key etc. etc. smaller diameter pulley PLUS you're gonna need good belt tension and all the correct pulleys so there's no belt slip. Thats one reason I like the cheaper readily available three wire units.

John T
 
Good for you, be sure you have a good tight belt and let us know how it works out for you.

John T
 
If someone already has a one wire and has exciting problems and unit is not returnable its possible to remove the rubber plug. This will give access to 2 tabs which when connected correctly as a three wire will work.
 
I have found that to be a yes no and maybe thing. On some it works and on others it does not work.
 
Hey OLD how you doing is this heat. Dont over do as these young guys need us old farts to keep them in line. Guess my answer is fitting in the maybe category then. LOL
 
Heat index in my area is in the 100-105 today. So I am listening to good old rock and roll and canning some red cabbage. Get to rake and bale hay tomorrow.
By the way on the alternator and that plug on my 8N ford I tried to wire it up as a 3 wire and it did not work.
 
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