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Wire Harness Diagram - Ryobi Homelite RY48ZTR75/100 Manual

Electrical components troubleshooting and testing

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Wire Harness Diagram

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Questions and answers

Jim Farrell
April 1, 2025

both blade motor controllers smoked after replacing batteries with lifepo4 batteries. are there any ways to fix this and still use lifepo4 batteries

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Mr. Anderson
April 1, 2025

To fix the blade motor controllers on a Ryobi Homelite RY48ZTR75/100 after they smoked from using LiFePO4 batteries:

1. Check Fuse: If a fuse is blown, replace it with the same physical size, Amperage, and Voltage rating.

2. Inspect Wiring and Connectors: Check for loose or bad connections, especially around the blade motor controllers and related wiring.

3. Test Components: Use a Digital Multi Meter (DMM) to test power, key switch, and DC-DC converter. Ensure the mower is fully charged if possible.

4. Controller Communication: Blade motor controllers have a master-slave setup. If one controller fails, both shut down. Replace the damaged controller(s) as needed.

5. Use Correct Battery: Ensure the battery used is compatible with the system’s voltage and current specifications. LiFePO4 batteries may not be suitable if they caused damage.

6. Disassembly and Inspection: Remove the instrument panel cover to access and inspect the key switch and other connections.

If the controllers are visibly damaged or not functioning after checking these steps, they likely need replacement.

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