41
1.
The same as in Items 1 to 3 of Fuse Testing.
2.
Connect the red and black test lead probes in parallel to the two ends of a solenoid or relay.
The impedance of most of solenoids or relay coils is less than 200
:
. (See the details in the
automotive manual.)
Warning:
z
Both ends of a general solenoid or relay are connected with diodes.
z
Check to see if there is any damaged coil. Even if the coil is found satisfactory, the
solenoid or relay may still be damaged. The relay may be welded or worn due to the
frequent sparking of the contacts. The solenoid may be stuck when the coil is in an
on-position. Therefore some potential problems cannot be found in testing.
Starting/Charging System Testing
The on-off function of the engine starting system consists of a battery, engine starting button, solenoid
and relay starting buttons, lead connections and lines. During the operation of the engine, the
charging system keeps the battery charged. This system consists of an AC generator, voltage
calibrator, lead connections and circuits. The multimeter is an effective tool for the checking of these
systems.
72-9280: OPERATING MANUAL
