John Deere 318 User Manual

Page 336

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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

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This manual is related to the following products:

316, 420