pmsmechanic
Elite Member
- Joined
- Dec 6, 2013
- Messages
- 4,183
- Location
- Southern Alberta, Canada
- Tractor
- 4410 and F-935 John Deere, MF 245
Another simple test is to take a wrench, pliars or screwdriver and hold the metal part against the small bearing on the back of the alternator. If the bearing is magnetic it's charging. More magnetism = more charging volts.