Controller Lamps - Jacobsen 67971 – LF 3400 Parts & Maintenance Manual

5 TROUBLESHOOTING
5.2

CONTROLLER LAMPS _____________________________________________________

The controller is a solid state device that monitors and controls
electrical functions. The controller receives input signals from
various switches and sensors throughout the machine and
transmits output signals to operate relays, solenoids, and
warning lights. It controls and resets timers and contains built
in logic to control certain machine functions.
Each input and output signal is displayed through lamps
located on top of the controller. A closed input switch indicates
Lamp On - Circuit is active
Lamp Off - Circuit is inactive
Lamp
1,2,3,4 Program Select (2, 3 and 4 are not used)
5
Brake Switch
6
Seat Switch
7 Reel Level Switches
8
Mow Switch
9
Joystick - Lower
10
Joystck - Raise
11
Hydraulic Oil Level Switch
12
Neutral Switch
13
Backlap Switch
14
Keyswitch - Glowplug
15
Keyswitch - Start
16
Joystick Active
17 Hydraulic Filter Switch
18
Engine Oil Pressure Switch
28
Controller Functions by Lamp Number
INPUTS
Circuit
an active circuit and will turn an input lamp on, an open switch
an inactive circuit and will turn a lamp off. Outputs are active
when their lights are on.
It is important to note that in some cases a lamp or group of
lamps must be on or off for a condition to be true. For example,
to start the mower the Mow Switch must be off (lamp 8 off)
while the Neutral Start Switch (lamp 12), Brake Switch (lamp
6), and Fuel Valve Hold coil (lamp 27) must be on.
OUTPUTS
Lamp
19 Hydraulic Filter Light
20 Hydraulic Oil Level Light
21 Not Used
22 Glowplug Light
23 Lower Solenoid
24 Raise Solenoid
25 Glowplug Relay
26 Start Relay
27 Fuel Solenoid - Hold
28 4WD Solenoid
29 Audible Alarm
30 Mow Solenoid
31 Fuel Sonenoid - Pull
32 Power-Ignition
33 Power-Lights
Circuit