Cushman TURF-TRUCKSTER, Service & Repair Manual

Page: 226 / 263

ENGINE OIL PRESSURE SWITCH TEST
(See Figure 10J-1)
The engine oil pressure switch is a normally CLOSED
(NC) switch. When the ignition key is turned ON the
engine oil pressure light comes on. When the engine
is started and oil pressure increases above 10 psi, the
switch OPENS and the engine oil pressure light goes
OFF.
FIELD TEST
Engine oil pressure light does not come on when igni-
tion switch is turned ON.
Using a jumper wire, ground the switch terminal.
•
Light comes on, proceed with switch test, Step 1.
•
Light does not come ON, check circuit wiring and/or
bulb.
Engine oil pressure light does not go off when engine
is started.
Remove WT wire from switch terminal.
•
Light goes OFF, proceed with switch test, Step 1.
•
Light does not go OFF, check circuit wiring for
ground.
SWITCH TEST
1. Set multimeter to 200
Ω
(ohms) scale.
2. Connect test leads as shown.
•
There should be continuity and the meter should
read 0 to 0.5
Ω
(ohms).
3. Increase pressure above 10 psi.
•
Switch contacts should open.
NOTE
If switch tests OK and the engine oil pressure
light still does not go out, engine oil pressure
may be too low.
Replace a switch that does not meet all the above
tests.
ELECTRICAL SYSTEM
SECTION 10J. SENDERS AND ALARMS
10J-1
10J
POWER
OFF ON
200m
2
20
200
1000 750200
20
2
200m
20M
2M
200M
20K
2K
200
200
DC
V
AC
V
A
C
A
200
µ
2m
200m
2
2
200m
20m
10A
2m 200
µ
DCA
20m
10A
COM A 10A
!
1000V
750V
MAX
!
!
2A
MAX
10A MAX
500V
MAX
200m
2
20
200
1000 750200
20
2
200m
20M
2M
200M
20K
2K
200
200
DC
V
ACV
A
C
A
200
µ
2m
200m
2
2
200m
20m
10A
2m 200
µ
DCA
20m
10A
COM A
!
2A
MAX
V -
-
Figure 10J-1. Engine Oil Pressure Switch Test