Electrical System - Jacobsen LF550-H-T4F Safety, Operation And Maintenance Manual

9 MAINTENANCE

9.20 ELECTRICAL SYSTEM ____________________________________________________________

Always turn the ignition switch to the off position and remove the negative (BLACK) battery cable before you inspect
or service the electrical system.
General precautions to decrease electrical problems are -
• Make sure that all the connections are clean and correctly fastened.
• Check the interlock system, fuses and circuit breakers at normal intervals. If the interlock system does not
operate correctly and you can not correct the problem, contact an authorized Jacobsen Dealer.
• Keep the wiring harness away from hot surfaces and moving parts.
• Make sure the seat switch wiring harness is connected to the mower wiring harness.
• Check the battery and the alternator.
• Do not wash or pressure spray around electrical connections and components.
The electrical system is monitored and controlled by the controller found behind the operator compartment. The
controller has 28 light emitting diodes (LED) that can help to correct electrical system problems.
A circuit breaker, six fuses and three relays found on or near the controller are used to protect the mower circuits.
For factory help with controller problems, give the hardware revision and software version found on the controller.
The replacement controllers with higher revision levels will be compatible.
CB1 - 50 Amp Circuit Breaker
63
F6
20
F7
OUTPUTS
2-1 RAISE SOL
20
2-2 MOW SOL
2-3 BACKLAP SP;
2-4 LOWER SOL FUSES
2-5 GLOW RELAY 20 AMPS MAX
POWER INPUT 1
2-6 START RELAY
2-10 FUEL SOL HOLD POWER INPUT 2
3-1 FUEL SOL PULL
2-9 BRAKE SOL
2-12 SPARE
3-9 EDC SOL
3-10 EDC SOL
Hardware
2-11 SPARE
3-2 ENG TEMP
3-7 TRACTION
Revision
1-1 SEAT SW
1-2 SPARE
1-3 BACKLAP SW
1-12 REEL LVL SW
1-4 HYD OIL LVL SW
1-9 HYD FILTER SW
1-10 ENG OIL SW
2-7 ALTERNATOR
1-5 PRGM SEL 1
1-6 PRGM SEL 2
Software
1-11 PRGM SEL 3
COMM STATUS
POWER STATUS
Version
INPUTS
CR1 - Main Relay
CR2 - Glow Plug Relay
CR3 - Starter Relay
!
CAUTION
NOTICE
CB1
CR2
10
CR3
25
5
CR1
5
F1 - 10 Amp Fuse - ECU +12V
F2 - 25 Amp Fuse - Main Relay
F3 - 5 Amp Fuse - ECU Start
F4 - 5 Amp Fuse - EGR
F6 - 20 Amp Fuse - Ignition
F7 - 20 Amp Fuse - Lights
F1
F2
F3
F4