Suzuki Wagon R Manual page 1331

6G2-2 CRANKING SYSTEM
Possible symptoms due to starting system trouble would be as follows:
D Starting motor does not run (or runs slowly)
D Starting motor runs but fails to crank engine
D Abnormal noise is heard
D Starting motor does not stop running
Proper diagnosis must be made to determine exactly where the cause of each trouble lies ..... in battery, wiring
harness, (including ignition and starter switch), starting motor or engine.
Do not remove motor just because starting motor does not run. Check the following items and narrow down scope
of possible causes.
D Condition of trouble
D Tightness of battery terminals (including ground cable connection on engine side) and starting motor terminals
D Discharge of battery
D Mounting of starting motor
Condition
Motor not running
DIAGNOSIS
Possible Cause
No operating sound of magnetic switch
D Battery run down
D Battery voltage too low due to battery
deterioration
D Poor contact in battery terminal
connection
D Loose grounding cable connection
D Fuse set loose or blown off
D Poor contacting action of ignition switch
and magnetic switch
D Lead wire coupler loose in place
D Open-circuit between ignition switch
and magnetic switch
D Open-circuit in pull-in coil
D Poor sliding of plunger and/or pinion
D Shift lever switch is not in P or N,
or not adjusted (A/T)
D Brushes are seating poorly or worn down
Operating sound of magnetic switch
heard
D Battery run down
D Battery voltage too low due to battery
deterioration
D Loose battery cable connections
D Burnt main contact point, or poor
contacting action of magnetic switch
D Brushes are seating poorly or worn
down
D Weakened brush spring
D Burnt commutator
D Grounding of field coil
D Layer short-circuit of armature
D Crankshaft rotation obstructed
Correction
Recharge battery.
Replace battery.
Retighten or replace.
Retighten.
Tighten or replace.
Replace.
Retighten.
Repair.
Replace magnetic switch.
Repair.
Shift in P or N, or adjust switch.
Repair or replace.
Recharge battery.
Replace battery.
Retighten.
Replace magnetic switch.
Repair or replace.
Replace.
Replace armature.
Repair.
Replace.
Repair.