Doosan DX60R Shop Manual page 409

Magnetic Switch
If the starter motor becomes wet, replace the magnetic switch
even if the magnetic switch assembly function is normal.
Shunt Coil Continuity Test
Check for continuity between the "S" terminal and the switch
body using a multimeter (Figure 362). The multimeter should
indicate continuity.
If the multimeter does not indicate continuity, replace the
magnetic switch.
Series Coil Continuity Test
Check for continuity between the "S" and "M" terminals using a
multimeter (Figure 363). The multimeter should indicate
continuity.
If the multimeter does not indicate continuity, replace the
magnetic switch.
Coil Resistance Test
See "Starter Motor Specifications" on page -220 for the service
limit.
Contact Continuity Test
Depress the plunger at the bottom of the magnetic switch.
Check for continuity between the "B" and "M" terminals using a
multimeter (Figure 364). The multimeter should indicate
continuity.
If the multimeter does not indicate continuity, replace the
magnetic switch.
Engine
Figure 362
Figure 363
Figure 364
SP001693
Page 229