TM 9-2320-211-20
(e) Defective sending units will be replaced as
circuit to determine if 18 volts are present
prescribed in pertinent technical manuals.
when cranking the engine.
2-32. Ignition Circuit Test -- Gasoline.
a. Primary Circuit Test.
(1) Disconnect the primary wire at the distributor
NOTE
and insert the primary ignition adapter. Unscrew the plug
Prior to making ignition circuit checks, a
from the top of the distributor and insert the distributor
voltage check must be made on the starter
adapter (fig. 2-35).
(2) Place the voltage selector in the 50-volt position
and ground the negative () lead.
(3) Connect the positive (+) lead to the primary
adapter; turn on the ignition switch. The meter should
read battery voltage. (If voltage is present, skip the
ignition switch checks, since this indicates that the
ignition switch is functioning.)
(4) If no voltage is present with the ignition switch
on, check the generator regulator to see that it is properly
connected. If the regulator is unplugged at the battery
side, no voltage will be present at the distributor.
(5) If the voltage regulator is plugged in, remove the
meter leads and check the power to the ignition switch.
b. Ignition Switch Test.
(1) Remove battery ground cable.
(2) Disconnect the ignition switch feed wire (no. 10).
Connect the positive (+) voltmeter lead to the wire from
the battery to the switch (fig. 2-36.)
