John Deere 318 - Manual (Page 307)

A—TDC Ignition Relay C1—Condenser G1—Battery X12—Engine Harness 3-Pin
Contacts (S.N. 420001— ) M1—Starter Motor Connector
B—TDC Ignition Relay Coil E1—Spark Plug S1—Key Switch X22—TDC Module 2-Pin
C—Switch Transistor E2—Spark Plug S6—Seat Switch Connector
D—Time Delay Switch E3—Ignition Points T1—Ignition Coil X23—TDC Module 8-Pin
Transistor (S.N. —420000) W1—Engine Ground Connector
E—Time Delay IC (Internal F1—20 Amp Fuse X1—Key Switch 5-Pin X27—Single Point Ground
Circuit) F2—2 Amp Fuse Connector 1-Pin Connector:
A1—Time Delay Control (Early Machines) X2—Key Switch 1-Pin 316 (S.N. 596121— )
(TDC) Module 3 Amp Fuse Connector 318 (S.N. 600305— )
A2—Ignition Module (Later Machines) X11—Seat Switch 2-Pin 420 (S.N. 595881— )
(S.N. 420001— ) F3—25 Amp Circuit Breaker Connector
NOTE: 1. For machines 316 (S.N. —596120), 318
(S.N. —600304) and 420 (S.N. —595880),
brake switch (S4) is not used. Interlock
current flow to transistor (C) comes from
transmission neutral start switch (S5).
NOTE: 2. The illustration shows ground circuit for
machines (S.N. 475001— ). For machines
(S.N. —475000), the blk wire from the TDC
module 2-pin connector terminates (grounds)
at the right pedestal panel.
M77922
-19
-04MAR95
MX,159024020,4 -19-16MAY95
Component Location and Operation/Theory of Operation
TM1590 (17MAY95)
240-15-5
316, 318 & 420 Lawn and Garden Tractors
020895
240
15
5