Jacobsen 70528, Parts & Maintenance Manual

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MAINTENANCE 4
25
Always check Interlock System after servicing the electrical system!
Relay Description Function
KYA / K2 Key Switch “A” Holds fuel stop solenoid valve open when ignition switch is in the RUN position and opera-
tor is seated.
Activates glow plug timer if engine isn’t running.
KYI / K1 Key Switch “I” Opens fuel stop solenoid valve when ignition switch is in the START position, power take-
off switch is OFF, parking brake and neutral switches are closed.
KYS / K3 Key Switch “S” Cranks starter motor when ignition switch is in the START position, power take-off switch is
OFF, parking brake and neutral switches are closed.
BK1 / K4 Brake -Start Part of starting circuit. Relay closes when parking brake is engaged.
BK2 / K5 Brake-Run Disconnects power to cruise control relay (CRS) with parking brake engaged.
Disconnects power to the fuel valve when the operator leaves seat with parking brake dis-
engaged.
NT1 / K6 Neutral-Start Part of starting circuit. Relay closes when traction pedal is in neutral.
NT2 / K7 Neutral-Run Disconnects power to the fuel stop solenoid valve when operator leaves seat with neutral
switch still open (traction pedal pressed).
NT3 / K8 Neutral-Cruise Disconnects power to cruise control when neutral switch is closed (traction pedal in neu-
tral).
ML / K9 Mow -Left
Deck
Energizes solenoid to left side deck valve when deck is lowered and power take-off switch
is ON.
MC / K10 Mow-Center
Deck
Energizes solenoid to front deck valve when deck is lowered and power take-off switch is
ON.
MR / K11 Mow-RIght
Deck
Energizes solenoid to right side deck valve when deck is lowered and power take-off switch
is ON.
CRS / K12 Cruise Control Activates cruise control when cruise control switch is closed, traction pedal is pressed and
parking brake is disengaged.
4WD / K13 Four Wheel
Drive
Energizes solenoid to four wheel drive valve when four wheel drive switch on instrument
panel and forward sensing switch on traction pump are closed.
LTS Lights Included with light harness kit 5003564. Controls operation of lights.
K15 Run Circuit
Cutout
Disables run circuit when keyswitch is turned to START position.
K16 Auxilliary Provides power to ignition circuit with keyswitch in RUN position. Disables ignition circuit in
START position
K17 Ignition Provides power to gauges, mow circuit, 4WD circuit and seat switch circuit
K1 K2 K3 K4 K5 K6 K7 K8 K9 K10 K11
K12 K13
K17 K16 K15
MR MC ML NT3 NT2 NT1 BK2 BK1 KYS KYA KYI
K15 K16 K17
LTS 4WD CRS
Wire Harness Label
Schematic Code