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Ryobi Homelite RY48ZTR75/100 Manual page 30

Electrical components troubleshooting and testing

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Seat Switch is Normally Open (N.O.) when no pressure is applied to seat
1. Power Mower
2. Set DMM to measure Resistance.
3. Disconnect seat switch connectors.
4. Measure continuity when switch is pressed.
5. Measure very high resistance when switch is released.
0-.2 Ohms nominal when pressed
To Measure the harness:
1. Turn ON the mower.
2. Set DMM to DC Volts.
3. Measure 5VDC between the 2 pins on the harness.
Note: this switch operates at 5V.
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Testing Seat Switch
OFF.
30

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