JLG sky trak mmv Service Manual page 73

Before checking a malfunctioning electrical circuit,
examine the applicable wiring diagram (refer to Section
10, Electrical System ) to help identify the components
involved. Problems can often be identified by noting
whether other components related to the circuit are
functioning properly. When several components or
circuits fail at one time, the problem is probably related to
a poor ground connection, because several circuits share
that same connection.
Refer to Section 10, Electrical System for further
information.
12
13
15
14
17
16
20
21
23
24
27
28
No. Amp/Volt
10
30 Amp Main
11
15 Amp Ignition - Preheat
12 2 Amp Hourmeter
13 5 Amp Transmission Gear
14 5 Amp Transmission Direction
15 15 Amp Front Dash Display Panel
16 5 Amp Parking Brake
17 7.5 Amp Joystick Logic Panel
18 30 Amp Power Window
19 3 Amp LMI (Load Moment Indicator)
20 2 Amp Service Brake
21 7.5 Amp Front Wiper/Washer
22 7.5 Amp Left Fork Shift
23 5 Amp Steer Mode
24 7.5 Amp Top Wiper/Washer
25 7.5 Amp Right Fork Shift
26 7.5 Amp Rear Wiper
27 2 Amp Switch Lamps
28 25 Amp Heater
29 40 Amp Neutral Engage Relay
30 12 Volt Door Window Relay
31 12 Volt Closed Cab Accessory Power Relay
Model MMV Rev. 12/04
General Information, Specifications and Maintenance
18
11 10
19
22
31
29
25
OM10001
26
Circuit Protected
c. Fuses, Relays and Circuit Breaker
(Right Side Dash)
There is a separate fuse holder under the right side of the
dash containing three fuses. This fuse holder is located in
the cab wire harness. To gain access, remove the three
screws that secure the lower dash panel (8) in place.
To gain access to the fuses remove the cover (32) from
the fuse holder (33).
Refer to the following chart for the size of the fuse and
circuit protected.
There are seven relays (37 through 43) mounted to the
front of the cab. Refer to the following chart for the voltage
rating of each relay and circuit that they control.
30
34
32
No. Amp/Volt
34
7.5 Amp
35 25 Amp
36 25 Amp
37
38
39
40
41
42
43
33
36
35
Circuit Protected
Horn
Normal Lights
Blackout Lights
24 Volt Relay - Work Light Power
24 Volt Relay - High Beam Power
12 Volt Relay - Brake Light
12 Volt Relay - Light Power
12 Volt Relay - Blackout Ignition
12 Volt Relay - Normal Lights Ignition
12 Volt Relay - Reverse Signal
40
39
41
42
43
38
37
OM1011
2.57