Ultra motor A2B Metro, Service Manual

Page: 44 / 48

Brake Switch Test
The A2B Metro has two brake switch con-
nectors which are identical. Once the
identity of a particular switch has been
determined, label the switch side of each
connector FRONT or REAR so the switches
can be quickly identified in the future.
1. Remove the battery cap.
2. Disconnect the 2-pin brake switch con-
nector (A,
Figure 1
).
3. Connect an ohmmeter test probes
between the red and white terminals in
the switch side of the connector.
NOTE
Make sure to press the correct brake lever
when testing at particular brake switch
connector. If pressing one lever does not
produce continuity, repeat the test by
pressing the other brake lever before con-
cluding that the switch is faulty.
4. Apply the brake lever, and read the
meter. It should indicate continuity.
5. Release the brake lever. The meter
should indicate no continuity.
6. The switch is faulty if it fails either portion
of this test. Replace the brake lever.
Relay Test
1. Remove the battery cap (this chapter),
and remove the switch module from the
battery compartment.
2. While listening to the relay, turn the key
switch to A and turn to OFF. An audible
click should be heard when the key switch
is turned off.
3. If an auxiliary battery is installed, repeat
Step 2 by turning the key switch to B and
then OFF.
4. A relay is faulty if a click is not heard.
Replace the switch module.
Charger Port Test
1. Remove the battery cap (this chapter).
2. Disconnect the halves of the 2-pin char-
ger-port connector (D,
Figure 1
) for the
main battery.
ELECTRICAL TROUBLESHOOTING
Motor Input Voltage Test
1. Remove the heat shrink tubing, and dis-
connect the 2-pin motor power connector
(
Figure 7
).
2. Connect the test probes of a voltmeter
to the red and black terminals in the
switch-module side of the motor power
connector.
3. Turn the key switch to A, and operate
the throttle. The meter should indicated 36
volts DC or greater.
4. If the voltage is less than 15 volts DC, the
battery is undercharged. It is either not
charging or not holding a charge.
5. If an auxiliary battery is installed, turn the
key switch to B and repeat the test.
Key Switch Test
1. Remove the battery cap (this chapter).
2. Disconnect the 4-pin key switch con-
nector (F,
Figure 1
).
3. Connect one ohmmeter test probe to
the white terminal in the switch side of the
connector; connect the other test probe
to the red terminal (switch side).
4. Turn the key switch to A, and read the
meter. It should indicate continuity.
5. Connect one ohmmeter test probe to
the black terminal in the switch side of the
connector; connect the other test probe
to the green terminal (switch side).
6. Turn the key switch to B, and read the
meter. It should indicate continuity.
7. The key switch is faulty if it fails either por-
tion of the test. Replace the switch.
Chapter Seven
7-4
FIG. 7