Question about Craftsman 20 Hp 42" Deck Lawn Tractor

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Battery not charging

I have a 12hp 38'' Craftsman mower with a B&S engine. The battery is is always discharging. Where does the wire from the armature connect to?

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My 24HP 42" did the same. If your model is like mine, there are two black wires with a yellow connector coming down the side of the engine. Unplug those wires, and with engine running, and a multimeter leads attached to them measure for 15 volts AC. If good reconnect yellow wires, and test the single red wire with multimeter red test lead connected and black test lead to any engine ground point. Measure for 15 volts DC. My problem was that square regulator that did not convert 15 VAC to 15 VDC. If your tractor is less than two years old, the warranty will cover labor and repair. Also if your tractor's wiring has different color wires, the test procedure may be different.

Posted on May 19, 2010

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