ELECTRICAL SYSTEM
M6040, M7040, WSM
9-S3
EASY CHECKER™
Symptom Probable Cause Solution
Reference
Page
Engine Oil Pressure
Lamp Lights Up
When Engine is
Running
Engine oil pressure too low Repair 1-S15
Engine oil insufficient Replenish G-10
Engine oil pressure switch defective Replace 9-S28
Short circuit between engine oil pressure switch
lead and chassis
Repair 9-S28
Circuit in panel board defective Replace 9-S25
Engine Oil Pressure
Lamp Does Not Light
When Main Switch is
Turned ON and
Engine Is Not
Running
Meter panel defective Replace 9-S25
Engine oil pressure switch defective Replace 9-S28
Wiring harness disconnected or improperly
connected (between meter panel and engine oil
pressure switch)
Repair or replace –
Circuit in meter panel defective Replace 9-S25
Charge Lamp Does
Not Go OFF When
Engine Is Running
Alternator defective Repair or replace 9-S19
Short circuit between alternator terminal L and
chassis
Repair –
Circuit in meter panel defective Replace 9-S25
Charge Lamp Does
Not Light When Main
Switch Is Turned ON
Wiring harness disconnected or improperly
connected (between meter panel and alternator)
Repair or replace –
Circuit in meter panel defective Replace 9-S25
PTO Lamp Lights Up
When PTO Switch Is
OFF Position
PTO switch is defective Replace 9-S29
PTO Lamp Does Not
Light Up When PTO
Switch Is ON Position
PTO switch is defective Replace 9-S29
Meter panel defective Replace 9-S25
Fuel Level Indicator
Lamp Lights Up
Fuel insufficient Replenish G-10
Fuel level sensor defective Replace 9-S32
Short circuit between fuel unit lead and chassis Repair –
Circuit in meter panel defective Replace 9-S25
Fuel Level Indicator
Lamp Does Not Light
When Fuel Tank Is
Empty
Fuel level sensor defective Replace 9-S32
Wiring harness disconnected or improperly
connected (between meter panel and fuel unit)
Repair or replace –
Circuit in meter panel defective Replace 9-S25
Coolant Temperature
Indicator Does Not
Light When Water
Temperature Gauge
Points to H (Red
Zone)
Fuse blown Replace –
Coolant temperature sensor is defective Replace 9-S28
Wiring harness disconnected or improperly
connected (between panel and coolant
temperature sensor)
Repair or replace –
Circuit in panel board is defective Replace 9-S25
4WD Indicator Lamp
Lights Up When 4WD
Is Not Engaged
4WD switch is defective Replace 9-S33
4WD Indicator Lamp
Does Not Light When
4WD Is Engaged
4WD switch is defective Replace 9-S33
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