Jacobsen HR-9016 Turbo Maintenance Manual page 28

4 MAINTENANCE
Always check Interlock System after servicing the electrical system!
Wire Harness Label
Schematic Code
Relay Description
KYA / K2 Key Switch "A"
KYI / K1 Key Switch "I"
KYS / K3 Key Switch "S"
BK1 / K4 Brake -Start
BK2 / K5 Brake-Run
NT1 / K6 Neutral-Start
NT2 / K7 Neutral-Run
NT3 / K8 Neutral-Cruise
ML / K9
Mow -Left
Deck
MC / K10 Mow-Center
Deck
MR / K11 Mow-RIght
Deck
CRS / K12 Cruise Control
4WD / K13 Four Wheel
Drive
LTS Lights
K15 Run Circuit
Cutout
K16 Auxilliary
K17 Ignition
en-28
K15 K16 K17
K15 K16 K17
MR MC ML NT3 NT2 NT1 BK2 BK1 KYS KYA KYI
K11 K10 K9
Function
Provide power to alternator IG circuit when ignition switch is in the RUN position and
operator is seated.
Provides power to KYS/K3 relay when power take-off switch is OFF, parking brake and
neutral switches are closed.
Cranks starter motor when ignition switch is in the START position, power take-off switch is
OFF, parking brake and neutral switches are closed.
Part of starting circuit. Relay closes when parking brake is engaged.
Disconnects power to cruise control relay (CRS) with parking brake engaged.
Disconnects power to the alternator IG circuit when the operator leaves seat with parking
brake disengaged.
Part of starting circuit. Relay closes when traction pedal is in Neutral.
Disconnects power to the alternator IG circuit when operator leaves seat with neutral switch
still open (traction pedal pressed).
Disconnects power to cruise control when neutral switch is closed (traction pedal in
Neutral).
Energizes solenoid to left side deck valve when deck is lowered and power take-off switch
is ON.
Energizes solenoid to front deck valve when deck is lowered and power take-off switch is
ON.
Energizes solenoid to right side deck valve when deck is lowered and power take-off switch
is ON.
Activates cruise control when cruise control switch is closed, traction pedal is pressed and
parking brake is disengaged.
Energizes solenoid to four wheel drive valve when four wheel drive switch on instrument
panel and forward sensing switch on traction pump are closed.
Included with light harness kit 5003564. Controls operation of lights.
Disables run circuit when keyswitch is turned to START position.
Provides power to ignition circuit with keyswitch in RUN position. Disables ignition circuit in
START position.
Provides power to gauges, mow circuit, 4WD circuit and seat switch circuit.
LTS 4WD CRS
K13 K12
K8 K7 K6 K5 K4 K3 K2 K1