Rectifier Circuit Check:
Check the rectifier resistance as follows.
Disconnect the regulator/rectifier connector.
Connect the hand tester (special tool) to the regulator/rec-
tifier as shown in the table, and check the resistance in
both directions of each diode in the rectifier following the
The resistance should be low in one direction and more
than ten times as much in the other direction. If any two
leads are low or high in both directions, the rectifier is
defective and the regulator/rectifier must be replaced.
The actual meter reading varies with the meter used
and the individual rectifier, but, generally speaking the
lower reading should be from zero to one half the scale.
Regulator Circuit Check:
To test the regulator out of circuit, use three 12 V batteries
and a test light (12 V 3 ∼ 6 W bulb in a socket with leads).
The test light works as an indicator and also a cur-
rent limiter to protect the regulator/rectifier from ex-
cessive current. Do not use an ammeter instead of
a test light.
ELECTRICAL SYSTEM 16-33