JLG sky trak mmv Service Manual page 584

Electrical System
c. Battery Equalizer Testing
The 24V voltage must be within the 18-32V equalizer op-
erating voltage range, or the equalizer will turn off into a
self-protection mode.
The normal 12V measurement should be within
±1% of the 24V measurement, divided by two.
(approximately ±0.2V):
12V Measure = (24V Measure) ÷ 2 ±1% (±0.2V)
1. Find the 24V measurement by taking the voltage
from the 24V equalizer stud (3) to the GND equalizer
stud (6).
2. Find the 12V measurement by taking the voltage
from the 12V equalizer stud (5) to the GND equalizer
stud (6).
3. Turn the ignition switch to the RUN position.
• If the 12V voltage is lower than normal and the
status indicator is OFF, the equalizer should be
replaced.
• If the 12V voltage is higher than normal and the
status indicator is OFF, check the "A" battery or
charging system for faults. The equalizer is not
the problem.
d. Battery Equalizer Removal
1. Remove engine side battery box cover (1). Remove
wing nuts (2) and carriage bolts (3) and set cover
and mounting hardware aside for later re-assembly.
2. Disconnect the negative (-) battery cable (4) at the
battery negative (-) terminal on the battery in the
engine side battery box.
3. Disconnect the negative (-) cable (5) at the bottom of
the battery equalizer (6).
10.104
2
1
3
4. Disconnect and label the two positive cables
connected to the battery equalizer (7).
5. Remove the fuel shut off relay (8) from the wire
harness bracket (9) mounted on the battery
equalizer mounting bracket (10).
12
8
13
9
16
6
5
4
MM2911
10
7
17
12
15
11
14
MM5010
Model MMV Rev. 12-04