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#1
06-12-2025, 10:02 PM
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I1050 doesn’t charge
I’ve been working on my 2011 i1050 tractor with the Kohler Vtwin engine. It quit charging the battery so I googled how to troubleshoot the charging system. Took the engine cover off and loosened the voltage regulator to test the stator. I clamped the regulator to the engine shielding and used my multimeter to check acv between the outer two pins on the regulator and got 42 volts ac which I thought meant the stator was working. I then checked dcv on the center pin to ground and got 0 volts which I took as a bad voltage regulator. I bought a new regulator on Amazon and hooked it up and checked voltage again. 42 acv on the two outer pins, but only 7.5 vdc on the center pin to ground. Thought I had received a bad regulator so I returned it and bought a different regulator. Hooked that one up and got the same issue, only 7.5 volts on the center pin and it’s not charging.
What am I missing here, could both new regulators be faulty? 
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#2
06-13-2025, 08:19 AM
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Do you have the connector on the v/r and the battery hooked up when getting the 7.5 vdc reading?
If not, the reading may be erroneous because I believe the battery is needed to supply some "bias" or "load" to the regulator. Also, the v/r should be making a good ground connection to the engine shroud and make sure that all your other connections are clean and tight.
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#3
06-13-2025, 10:36 AM
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Yes, I had all wiring including the battery connected during testing. I had the v/r clamped to the engine shield so I could access the connector for testing. Just to make sure it wasn’t charging I tested battery voltage with the engine running full throttle and only see 12.5 vdc.
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