John Deere 318 - Manual (Page 336)

4i
Power Circuit
Voltage Test at
2-Amp or 3-Amp
Fuse
Turn key switch to
RUN position.
M55140 -UN-13APR95
M77926 -UN-12APR95
For machines:
316 (S.N. —475000)
318 (S.N. —475000)
420 (S.N. —595880),
check for voltage at
both ends of 2-amp,
in-line fuse (B).
For machines:
316 (S.N. 475001— )
318 (S.N. 475001— )
420 (S.N. 595881— ),
check for voltage at
both contacts of 3-amp
fuse (D).
VOLTAGE BOTH
SIDES: Replace red
wire to TDC 8-pin
connector.
VOLTAGE ONE SIDE:
Check fuse contacts.
NO VOLTAGE: GO TO
1e
4j
PTO circuit Test at
PTO Switch
Key switch OFF.
PTO switch OFF.
Install jumper wire
across seat switch
connector.
M55144 -UN-09DEC89
Turn key switch to RUN
position.
Move PTO switch to
ON position.
Check for voltage at
double blue leads (A)
at PTO switch.
VOLTAGE: Replace
blue wire to PTO clutch
connector.
NO VOLTAGE: GO TO
4k
4k
PTO Circuit Test
at PTO Switch—
Continued
Jumper wire across
seat switch connector.
Key switch at RUN
position.
PTO switch ON.
M55145 -UN-09DEC89
Check for voltage at
single blue lead (A) on
PTO switch. VOLTAGE: Replace
PTO switch.
NO VOLTAGE: GO TO
4l
4l
PTO Circuit Test
at TDC Module
Jumper wire across
seat switch connector.
Key switch at RUN
position.
PTO switch ON.
M37181 -UN-25JAN90
Check for voltage at
single blue wires (A) at
TDC 8-pin connector. VOLTAGE ONE LEAD:
Repair connector.
VOLTAGE BOTH
LEADS: Replace blue
wire from 8-pin
connector to PTO
switch.
NO VOLTAGE: GO TO
4m
MX,159024025,65-19-16MAY95
MX,159024025,66-19-16MAY95
MX,159024025,67-19-16MAY95
MX,159024025,68-19-16MAY95
Electrical System Diagnosis/PTO Clutch and Lamp Tests
TM1590 (17MAY95)
240-20-24
316, 318 & 420 Lawn and Garden Tractors
020895
240
20
24