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TROUBLESHOOTING & REPAIR
F-34 F-34
RANGER 305D
IDLER SOLENOID TEST (continued)
FIGURE F.7– PLUG(S) PIN LOCATION
TEST PROCEDURE
1. Turn the engine off.
2. Open the right side engine service access
door.
3. Locate the idler solenoid mounted on the
fuel injection pump. (See illustration in
Fuel Solenoid Test)
4. Locate and unplug harness connection P/J
72. Cut any necessary cable ties. See
Wiring Diagram.
5. Using the volt/ohmmeter, check the pull-in
coil resistance, pins 3 and 4 (black wire to
white wire). The normal resistance is less
than 0.5 ohms. Check the hold-in coil
resistance, pins 3 and 2 (black wire to red
wire). The normal resistance is approxi-
mately 12 to 15 ohms. Check the resis-
tance between pin 3 (black wire) and a
clean, unpainted chassis ground. The
resistance should be very high. 500,000
Ohms or more. If any of the above resis-
tance values are incorrect, the solenoid
may be faulty. Replace. See Figure F.7.
6. Using the external 12VDC supply, apply
12VDC to the pull-in coil leads at pins 3+
and 4- (black wire to white wire). The sole-
noid should activate. REMOVE THE
VOLTAGEIMMEDIATELY to avoid dam-
age to the unit.
Apply 12VDC to the hold-in coil at pin #3
(blackwire +) and pin #2 (red wire -). While
the voltage is applied, manually move the
solenoid to the low idle position. Thesole-
noid plunger should hold this position until
the voltage is removed. See Figure F.7.
7. Ifeither coil does not operate as described,
check for mechanical restrictions or other
problems with the linkage.
8. If the linkage is intact and the solenoid
does not operate correctly when the
12VDC is applied, the solenoid may be
faulty. Replace.
9. Re-connect idle solenoid and replace any
previously removed cable ties.
10. If finished testing, close the engine service
access door.

BLACK

RED

P-72 J-72
IDLE SOLENOID
CONNECTOR
(LEAD ENTRY VIEW)
IDLE SOLENOID
WIRING HARNESS
CONNECTOR
(LEAD ENTRY VIEW)

1

3

2

4

WHITE

3

1

4

2

215

210A

232

TOCONTROL
P.C.BOARD
PULLCOIL
P.C.BOARD
STARTBUTTON