Technician Service Guide 33367B
4
the same point inside the charger where the BLACK
(-) DC cord lead connects. Test points E & F on the
service wiring diagram. Connect the DC output cord
to the equipment charging receptacle and record the
DC voltage measured. See figure 1.
Figure 1
The DC voltage measured at these test points must
be the same as the battery system voltage
measured at the batteries, before the charger can
operate. If the voltage measured is zero, or lower
than the results of prior measurements, then replace
the DC charging cordset and/or the equipment
charging receptacle and retest.
Measure and record battery DC voltage at
electronic timer kit.
If the DC voltage measured at test points E & F are
correct, carefully remove the timer kit edge
connector or flag terminals attached to the DC sense
leads of the control cable from the electronic timer.
Carefully examine the control cable assembly,
electronic timer assembly connector and compare to
the wiring diagram for the charger model. The same
DC voltage at test points E & F must be present at
the connector contacts of the RED (+) positive (pin 9
of the edge connector) and BLACK (-) negative (pin
5 of the edge connector) control cable assembly
sense wires, as shown on the service wiring
diagram. If no DC voltage is measured or the DC
voltage measured is lower than the DC voltage
measured at test points E & F, repair or replace the
control cable assembly. See figure 2.
Figure 2
If the DC voltage measured at the electronic timer
edge connector or flag terminals is correct, testing of
the AC line voltage must be performed.
DANGER: HAZARD OF ELECTRIC SHOCK!
THE FOLLOWING TESTS REQUIRE THE
CHARGER TO BE CONNECTED TO A LIVE AC
OUTLET. FOLLOW ALL ELECTRICAL SAFETY
PRECAUTIONS TO AVOID ELECTRIC SHOCK!
Inspect and test for proper AC supply voltage at
the outlet.
Disconnect the DC output cord from the equipment
charging receptacle. Verify the charger AC power
plug is disconnected and measure the AC line
voltage at the outlet with a suitable meter. If no
voltage is measured, test additional outlets until AC
voltage is measured. Read the charger nameplate
for the required nominal AC voltage and verify this
matches the measured AC voltage at the outlet.
Make sure the charger voltage selector switch is set
to the correct position, if equipped.
Verify charger AC input circuit wiring is correct.
Locate the charger nameplate model number and
verify it and the model number listed on the wiring
diagram specific for the model being serviced match.
With the charger cover removed, inspect and verify
the charger is wired correctly according to the wiring
diagram.
