John Deere 318 - Manual (Page 341)

BEFORE YOU START
Always perform the system checkout procedures in
Group 05 and the System Diagnosis in Group 20
BEFORE making any tests in this group. These
procedures include any special tooling required to identify
a failure. Make the repair and perform the System
Checkout in Group 05 to be certain all failures are
solved.
;
KEY SWITCH TEST
Remove key switch
from machine. Test
terminals for continuity
using a continuity tester
or ohmmeter.
M37207 -UN-29AUG88
Key
Position
Continuity
OFF . . . . . . . . . NONE
RUN . . . . . . . . . B + A
START . . . . . . . B + A,
S 1 + S 2
CONTINUITY: Key
switch OK.
NO CONTINUITY:
Replace key switch.
‘
CIRCUIT BREAKER
TEST
M37397 -UN-25JAN90
NOTE: Machines:
316 (S.N. —362983)
318 (S.N. —364137)
420 (S.N. —360009)
shown.
Disconnect wires (A)
from circuit breaker.
Connect ohmmeter
across the circuit
breaker terminals. ZERO RESISTANCE:
Circuit breaker OK.
RESISTANCE: Replace
circuit breaker.
MX,159024030,1 -19-16MAY95
MX,159024030,2 -19-16MAY95
MX,159024030,3 -19-16MAY95
Group 25
Electrical System Component Tests and Adjustments
TM1590 (17MAY95)
240-25-1
316, 318 & 420 Lawn and Garden Tractors
020895
240
25
1