Yamaha MX250 - Checking the Engine Switch; Checking the Oil Level Switch

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ELECTRICAL
ELECTRICAL COMPONENTS
CHECKING THE ENGINE SWITCH
1.
Check:
• Engine switch continuity
Out of specification  Replace.
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a. Disconnect the engine switch connectors.
b. Connect the digital circuit tester () to the engine
switch connectors as shown.
c. Check the engine switch continuity.
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CHECKING THE OIL LEVEL SWITCH
1.
Disconnect:
• Oil level switch
(from the bottom of the crankcase cover)
2.
Check:
• Oil level switch continuity
Out of specification  Replace.
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a. Connect the digital circuit tester () to the oil level
switch as shown.
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a
b
Model 88 Multimeter with tachometer:
YU-A1927
Digital circuit tester (CD732):
90890-03243
• Positive tester probe 
Black “1”
• Negative tester probe 
Black “2”
• Engine switch “ON” 
Continuity “a”
• Engine switch “OFF” 
No continuity “b”
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Model 88 Multimeter with tachometer:
YU-A1927
Digital circuit tester (CD732):
90890-03243
• Positive tester probe 
Oil level switch lead “1”
• Negative tester probe 
Body ground “2”