Testing Voltage Regulator

   / Testing Voltage Regulator #1  

ufengineer

Bronze Member
Joined
Sep 27, 2015
Messages
54
Location
Jacksonville, florida
Tractor
ym2010
My tractor isn't charging its battery. I tested the alternator and it seems to be working. How do you test the voltage regulator? What are the other likely culprits? I hate to just start replacing parts. What about wiring or connectors?

The little alternator light on the dash is on.

The tractor is a ym2010.

Thanks
 
   / Testing Voltage Regulator #2  
Start with the simple first. Check ground wire as well as positive connections. Test the voltage going into and out of the voltage regulator.
Should be around 12.8 to 13.7 volts coming out of the regulator. If you can read the label on the regulator it should tell you what the output should be.
Measure the voltage on the battery terminals while the tractor is running. If less than 12v then the problem is most likely the regulator.
Have you load tested the battery? It may show 12v but with a bad cell cannot put out the amps.
 
   / Testing Voltage Regulator
  • Thread Starter
#3  
Anyone try this procedure? I did and it looks like the voltage regulator is bad. 1447454948186.jpg
 
   / Testing Voltage Regulator #4  
Looks like you found the problem.:thumbsup:
 
   / Testing Voltage Regulator
  • Thread Starter
#5  
Thanks Dave. I'm trying to figure out which on to get. Prices vary from $30 to $120 ? Hoye has them for $75.
 
   / Testing Voltage Regulator #6  
Well at $120 you can buy four of the $30 ones.
 
   / Testing Voltage Regulator #7  
Do you have the dynamo or an alternator? Depending on that answer, I think there is a datsun part that will work too???? Do a search on datsun regulator.
 
   / Testing Voltage Regulator #8  
The '72 Datsun alternator and matching regulator were used by Yanmar on YM2000 and probably some earlier similar models.

I don't know if they continued with that set for the YM2010.
 
   / Testing Voltage Regulator #10  
Part# AL-1215 12V 15amp. is what Fredricks Outdoors is showing. My bet at 15amp. that's a Dynamo.
 

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