User Manual

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