Yamaha YZ250FM 2021 Owner's Service Manual

ELECTRICAL COMPONENTS8-45has cooled down to the ambient tempera-ture.e. Measure the voltage between the batteryterminals.13.25 V or more  The battery is normal.Checking is finished.10 V or more and less than 13.25 V Perform from step (c) again.Less than 10 V  Replace the battery.TIPBefore replacing the battery, make sure that thebattery temperature is proper (temperature notmore than 65 C (149 F) or less than 0 C (32F)). Otherwise, wait until the battery tempera-ture is proper and perform the procedure fromstep (c) again.EAM30292CHECKING THE RELAYSCheck each switch for continuity with the digitalcircuit tester. If the continuity reading is incor-rect, replace the relay.1. Disconnect the relay from the wire harness.2. Connect the digital circuit tester () and bat-tery (12 V) to the relay terminal as shown.Check the relay operation.Out of specification  Replace.Starter relayMain relayEAM30495CHECKING THE RELAY UNIT (DIODE)1. Check:• DiodeOut of specification  Replace.TIPThe digital circuit tester and the multimeter withtachometer readings are shown in the followingtable.Digital circuit tester (CD732)90890-03243Model 88 Multimeter with tachom-eterYU-A19271. Positive battery terminal2. Negative battery terminal3. Positive tester probe4. Negative tester probeResultContinuity(between “3” to “4”)2 134R/WBr/WR/YL1. Positive battery terminal2. Negative battery terminal3. Positive tester probe4. Negative tester probeResultContinuity(between “3” to “4”)Digital circuit tester (CD732)90890-03243Model 88 Multimeter with tachom-eterYU-A19271234L/RBrRR,R/W