Suzuki Wagon R Manual page 620

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 har-
ness, (including ignition and starting motor 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 Shift lever switch is not in P or N, or
not adjusted (A/T)
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 Brushes are seating poorly or worn down
D Poor sliding or plunger and/or pinion
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
CRANKING SYSTEM 6G-3
Correction
Shift in P or N, or adjust
switch.
Recharge battery.
Replace battery.
Retighten or replace.
Retighten.
Tighten or replace.
Replace.
Retighten.
Repair.
Replace magnetic switch.
Repair or replace.
Repair.
Recharge battery.
Replace battery.
Retighten.
Replace magnetic switch.
Repair or replace.
Replace.