John Deere 318 - Manual (Page 337)

4m
20-Amp Power
Circuit Test at TDC
Module
Turn key switch to RUN
position.
M37290 -UN-25JAN90
Check for voltage at
pink and purple leads
and single purple lead
(A) at TDC 8-pin
connector. VOLTAGE ONE LEAD:
Repair connector.
VOLTAGE BOTH
LEADS: GO TO
4n
NO VOLTAGE: GO TO
1f
4n
TDC Ground
Check at 2-Pin
Connector
M36649 -UN-28APR95
Turn key switch to OFF
position.
Verify good ground at
TDC 2-pin connector
(A).
GOOD GROUND:
Replace TDC Module.
NO OR POOR
GROUND: Clean
connections and restore
good ground, then GO
TO
Å
, Group 05.
Ö
BRAKE NEUTRAL
START SAFETY
SWITCH TEST—
For Machines:
316 (SN 596121— )
318 (SN 600305— )
420 (SN 595881— )
PTO switch OFF.
Hydrostatic lever in
STOP position.
M77933 -UN-17JAN95
M77931 -UN-17JAN95
Release brake pedal
completely.
Turn key switch to RUN
position.
Check for voltage at
purple lead (A).
VOLTAGE: Check for
proper switch
engagement. IF OK;
replace switch, then
GO TO
Ö
, Group 05.
NOTE: Brake switch
engagement can be
adjusted by slightly
bending the
engagement pad that’s
welded on the brake
linkage shaft. Check for
proper brake
adjustment before
bending the tab. (See
Section 60, Group 10.)
MX,159024025,69-19-16MAY95
MX,159024025,70-19-16MAY95
MX,159024025,71-19-16MAY95
Electrical System Diagnosis/Brake Neutral Start Safety Switch Test
TM1590 (17MAY95)
240-20-25
316, 318 & 420 Lawn and Garden Tractors
020895
240
20
25