John Deere 318 User Manual
Page 309

A—Time Delay IC (Internal
F3—25 Amp Circuit Breaker
X3—Front PTO Switch 2-Pin
X24—Rear PTO Clutch 1-Pin
Circuit)
G1—Battery
Connector
Connector (Ground)
B—Time Delay Switch
M1—Starter Motor
X4—Front PTO Switch 3-Pin
X25—Rear PTO Lamp 1-Pin
Transistor
P1—Front PTO Lamp
Connector
Connector (Ground)
C—Isolation Diode
P2—Rear PTO Lamp
X5—Rear PTO Harness 3-Pin
X26—Front PTO Clutch 2-Pin
D—TDC PTO Relay Contacts
(Optional)
Connector
Connector
E—Isolation Diode
S1—Key Switch
X6—Rear PTO Switch 2-Pin
X27—Single Point Ground
F—Isolation Diode
S2—Front PTO Switch
Connector
1-Pin Connector:
G—TDC PTO Relay Coil
S3—Rear PTO Switch
X7—Rear PTO Switch 3-Pin
316 (S.N. 596121— )
A1—Time Delay Control
(Optional)
Connector
318 (S.N. 600305— )
(TDC) Module
S6—Seat Switch
X11—Seat Switch 2-Pin
420 (S.N. 595881— )
F1—20 Amp Fuse
W1—Engine Ground
Connector
Y1—Front PTO Clutch
F2—2 Amp Fuse
X1—Key Switch 5-Pin
X22—TDC Module 2-Pin
Y2—Rear PTO Clutch
(Early Machines)
Connector
Connector
(Optional)
3 Amp Fuse
X2—Key Switch 1-Pin
X23—TDC Module 8-Pin
(Later Machines)
Connector
Connector
M77923
-19
-04MAR95
MX,159024020,6 -19-16MAY95
Component Location and Operation/Theory of Operation
TM1590 (17MAY95)
240-15-7
316, 318 & 420 Lawn and Garden Tractors
020895
240
15
7