John Deere 318 - Manual (Page 340)

1!
LIGHTING TEST
Check bulbs and
20-amp fuse.
NOTE: If lights come
on when key switch is
in the RUN position,
but light switch is in
OFF position, replace
light switch.
Turn key switch to RUN
position.
NOTE: If either head or
tail lamp comes on
when light switch is
pulled to the ON
position, light switch is
OK: GO TO
1:a
.
Pull light switch to ON
position.
M77928 -UN-17JAN95
Check for voltage at
connector terminal (A).
NO VOLTAGE: GO TO
1c
VOLTAGE: Check for
voltage at other switch
terminal.
NO VOLTAGE: Replace
light switch.
VOLTAGE: GO TO
1:a
1:a
Voltage Test for
Head or Tail
Lamps
Turn key switch to RUN
position.
Pull light switch On.
M55063 -UN-09DEC89
NOTE: Machines
(S.N. —475000)
shown.
For machines (S.N.
475001— ), a 2-pin
connector is used.
Disconnect head light
connector (A) or tail
light connector and
check for voltage.
VOLTAGE: Check for
shorts, open wires, or
poor grounds in wiring
to head and tail lamps.
NO VOLTAGE: Yellow
wire from light switch to
connector is open.
Repair or replace.
MX,159024025,77-19-16MAY95
MX,159024025,78-19-16MAY95
Electrical System Diagnosis/Lighting Test
TM1590 (17MAY95)
240-20-28
316, 318 & 420 Lawn and Garden Tractors
020895
240
20
28