G643(E) Service Manual Chapter 4. Engine Electrical System 128
Refer to the following troubleshooting table
Symptom Possible cause Remedy
Fuse cut off Replace
Bulb burnt out Replace
Loose wiring connection Retighten
With ignition
switch ON,
charging
warning lamp
does not
illuminate
Bad connection of L terminal Inspect and replace wiring
Loose or worn drive belt Correct or replace
Fuse cut off Replace
Circuit breaker cut off Reset or replace
Faulty voltage regulator or alternator Inspect alternator
Faulty wiring Repair
With the
engine started,
warning lamp
is not turned
off (Battery
needs often
charging)
Corrosion or wear of battery cable Repair or replace
Faulty voltage regulator (Charging warning lamp illuminates) Replace
Overcharged
Voltage detection wring fault Replace
Loose or worn drive belt Correct or replace
Loose wiring connection Retighten
Short circuit Repair
Circuit breaker cut off Reset or replace
Ground fault Repair
Faulty voltage regulator (Charging warning lamp illuminates) Inspect alternator
Battery is
discharged
Battery out Replace