John Deere 318 - Manual (Page 318)

1e
Power Circuit Test
at Key Switch—
Fuse Side
Turn key switch to RUN
position.
M55141 -UN-09DEC89
Check for voltage at
key switch terminal “A”,
where red and pink
wires (A) connect to
key switch. VOLTAGE:
For 20-amp power
circuit, pink wire
between fuse and key
switch is open.
For 2-amp or 3-amp
power circuit, red wire
between fuse and key
switch is open.
Repair or replace wire
as necessary, then GO
TO
;
and
Å
, Group 05.
NO VOLTAGE: GO TO
1f
1f
Power Circuit Test
at Key Switch—
Battery Side
Key switch OFF.
M55142 -UN-09DEC89
Check for voltage at
key switch terminal “B”
where red wire (A) from
circuit breaker
terminates. VOLTAGE: Replace
key switch.
NO VOLTAGE: GO TO
1g
1g
Main Power
Circuit Test at
Circuit Breaker
Check 20-amp fuse.
If fuse is OK, remove
battery base to access
circuit breaker.
Set battery on air
cleaner cover, then
reroute negative (—)
cable to connect
battery.
M37158 -UN-25JAN90
NOTE: Early Models:
316 (S.N. —362983)
318 (S.N. —364137)
420 (S.N. —360009)
have starter soleniod
mounted next to
circuit breaker, as
shown.
On Later Models;
Starter solenoid is
on starter.
Check for voltage at
both terminals (A) of
circuit breaker.
VOLTAGE AT ONLY
ONE TERMINAL:
Replace breaker.
VOLTAGE AT BOTH
TERMINALS: Red wire
between key switch and
circuit breaker is open.
Repair or replace as
necessary, then GO TO
;
, Group 05.
NO VOLTAGE AT
EITHER TERMINAL:
For early machines, GO
TO
1h
.
For later machines,
replace red wire to
battery.
MX,159024025,15-19-16MAY95
MX,159024025,16-19-16MAY95
MX,159024025,17-19-16MAY95
Electrical System Diagnosis/Dash Lamp Circuit Tests
TM1590 (17MAY95)
240-20-6
316, 318 & 420 Lawn and Garden Tractors
020895
240
20
6