ELECTRICAL SYSTEM
B1220, B1620, B1820, WSM
9-S4
(EU)
[2] B1620 AND B1820
BATTERY
STARTING SYSTEM
Symptom Probable Cause Solution
Reference
Page
All Electrical
Equipments Do Not
Operate
Battery discharged or defective Recharge or Replace G-23, 9-S9
Battery positive cable disconnected or improperly
connected
Repair or Replace 9-S9
Battery negative cable disconnected or
improperly connected
Repair or Replace 9-S9
Slow blow fuse blown Replace G-37
Fuse Blown
Frequently
Short-circuited Repair or Replace –
Symptom Probable Cause Solution
Reference
Page
All Electrical
Equipments Do Not
Operate
Battery defective Recharge or Replace G-23, 9-S9
Alternator defective Repair or Replace 9-S29
Wiring harness disconnected or improperly
connected (between battery positive terminal and
regulator B terminal)
Repair or Replace –
Cooling fan belt slipping Adjust tension G-27
Symptom Probable Cause Solution
Reference
Page
Starter Motor Does
Not Operate
Battery discharged or defective Recharge or Replace G-23, 9-S9
Slow blow fuse blown Replace G-37
Safety switch improperly adjusted or defective Repair or Replace 9-S17
9-S22
Wiring harness disconnected or improperly
connected (between main switch 50 terminal and
starter relay, safety switches, between safety
switches and starter relay, between battery
positive terminal and starter motor)
Repair or Replace –
Timer relay defective Replace 9-S13
Starter motor defective Repair or Replace 9-S26
Main switch defective Replace 9-S11
Pre-heat indicator
Lamp Does Not Light
When Main Switch Is
in Pre-heat Position
Battery discharged or defective Recharge or Replace G-23, 9-S9
Slow blow fuse blown Replace G-37
Wiring harness disconnected or improperly
connected (between main switch 19 terminal and
pre-heat indicator, between pre-heat indicator
and glow plugs)
Repair or Replace –
Main switch defective Replace 9-S11
Pre-heat indicator defective Replace 9-S37
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