John Deere 318 - Manual (Page 320)

1k
Engine Oil
Pressure Lamp
Power Circuit Test.
Turn key switch to RUN
position.
M37299 -UN-25JAN90
Remove oil pressure
lamp socket from panel.
Remove bulb.
Check for voltage at
terminal with double
yellow wires (A).
NO VOLTAGE: GO TO
1a
1l
Engine Oil
Pressure Lamp
Short Circuit Test
Turn key switch OFF.
M55081 -UN-17JAN95
Disconnect engine
harness connector.
Check for continuity
between tan wire at
connector (A) and
engine ground.
CONTINUITY: Tan wire
is shorted to ground.
Repair or replace wire.
NO CONTINUITY:
Check engine oil
pressure. See Section
220.
1m
Battery Discharge
Lamp Test
Check 20-amp fuse.
If discharge lamp stays
on at all times, GO TO
1p
M37163 -UN-25JAN90
Connect a jumper wire
from brown wire (B) of
TDC connector to
ground.
Turn key switch to RUN
position.
LOOK: Indicator lamp
ON.
LAMP ON: GO TO
1q
LAMP NOT ON: Jump
from brown wire (A) to
ground. If lamp comes
on, repair connector.
Lamp still not on, GO
TO
1n
1n
Battery Discharge
Lamp Power Circuit
Test
Remove battery
discharge lamp socket
from dash panel.
Check bulb.
Turn key switch to RUN
position.
M36635 -UN-24APR89
Check for voltage at
terminal with yellow
wire (A). NO VOLTAGE: GO TO
1k
VOLTAGE: GO TO
1o
MX,159024025,21-19-16MAY95
MX,159024025,22-19-16MAY95
MX,159024025,23-19-16MAY95
MX,159024025,24-19-16MAY95
Electrical System Diagnosis/Dash Lamp Circuit Tests
TM1590 (17MAY95)
240-20-8
316, 318 & 420 Lawn and Garden Tractors
020895
240
20
8