Isuzu 2000 Trooper Workshop Manual page 854

Brush
Measure the length of brush.
Replace with a new one, if it is below the limit.
Standard: 16 mm (0.63 in)
Limit: 11 mm (0.43 in)
Brush Holder
Check for continuity between brush holder (+) (4) and
base (–). Replace, if there is continuity (i.e., insulation is
broken).
STARTING AND CHARGING SYSTEM
Magnetic Switch
Check for continuity of shunt coil between terminals S and
M.
Replace, if there is no continuity (i.e., coil is
disconnected).
065RW014
Continuity of Series Coil
Check for continuity between terminals S and M.
Replace, if there is no continuity (i.e., coil is
disconnected).
065RW015
6D3–11
065RW016
065RW017