YM2000 Alternator testing

   / YM2000 Alternator testing #1  

Mslater

New member
Joined
Nov 19, 2004
Messages
12
Location
Baton Rouge LA
Tractor
YM2000
Ok, I set my meter on ac and test which outputs? Thanks!
 
   / YM2000 Alternator testing #2  
You want DC, put leads across your battery terminals, looking for +14vdc+- at high idle.
 
   / YM2000 Alternator testing
  • Thread Starter
#3  
Thanks I'll check it out again!
 
   / YM2000 Alternator testing
  • Thread Starter
#4  
I checked at the batt running at about 1500 rpm and get 12.3 volts. Now that I know its not charging how to I narrow it down? Whats the procedure to test the alternator seperately? Thanks alot for your help!
 
   / YM2000 Alternator testing #5  
I'm not sure if your bridge rectifier is in the alternator or the regulator; however, you can unplug the regulator from the alternator and meter across the alternator post and look for +20+- volts on AC or DC scale. No voltage says bad alternator, +20+- says bad regulator, AC or DC reading gives the location of the rectifier, which changes voltage from AC to DC. It's usually a bad regulator.
 
   / YM2000 Alternator testing
  • Thread Starter
#6  
Gotcha, I'll give it a shot tomorrow. Thanks again!
 

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