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03-27-2005, 10:51 AM #1
- Join Date
- Mar 2005
- Posts
- 3
- Location
- East Texas
- Tractor
- 1987 Yanmar YM-220
Voltage Regulator
I have a yanmar YM-220, the charging light is staying on, it has the little 2 wire alt. how can I check to see if the reg. is working , can any of the parts stores like napa check this, if I take it off?
Thanks so much
Frank
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03-28-2005, 08:57 AM #2Veteran Member
- Join Date
- Feb 2005
- Posts
- 1,467
- Location
- Olathe, Ks
- Tractor
- Yanmar 1602D
Re: Voltage Regulator
I would think any parts store can check that alternator, and if it's putting out correctly, you'll probably need a regulator. Check that all the ground connections are good first tho........
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03-28-2005, 09:50 AM #3Veteran Member
- Join Date
- Apr 2000
- Posts
- 1,513
- Location
- Dixon, Il
Re: Voltage Regulator
Disconnect 2 alternator wires . Connect alternator wires to AC voltmeter. Run tractor at about full throttle. Output should be 20-30 volts AC. Don't run any longer than neccesary as damage may occur. If alternator is putting out sufficient voltage , regulator is probably bad.
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