
TROUBLESHOOTING AND ELECTRICAL SYSTEM
Test Procedures
2005 FE350 Gasoline Vehicle Maintenance and Service Supplement
Page 11-23
11
TEST PROCEDURE 9 – STARTER/GENERATOR (STARTER FUNCTION)
See General Warning, Section 10, Page 10-1.
1. Disconnect the battery cables as instructed.
See WARNING “To avoid unintentionally starting...” in
General Warning, Section 10, Page 10-1.
2. Ensure that wires are connected correctly and are tight. If they are not, rewire or tighten as necessary.
3. Disconnect the wires from all the terminals on the starter/generator. Then place the black (–) probe of a
multimeter, set to 200 ohms, on the starter/generator housing (scratch through the finish to ensure a
good ground). While holding the black (–) probe against the housing, place the red (+) probe (one at a
time) on the A1, A2, F1, F2 and DF terminals respectively
(Figure 11-20, Page 11-24)
. The readings
should be no continuity. If the readings are incorrect, the starter/generator will need to be removed from
the vehicle and disassembled by a qualified technician.
See Starter/Generator Removal, Section 12,
Page 12-1.
-
An incorrect reading from the A1 or A2 terminal indicates three possible problems: 1) a grounded A1
or A2 terminal, 2) a grounded wire in the brush area, or 3) a grounded armature/commutator.
-
If the F1 or F2 reading is incorrect, it indicates a possible grounded F1 or F2 terminal or a grounded
field coil.
-
If the DF reading is incorrect, it indicates a possible grounded DF terminal or a grounded field coil.
4. Disconnect the ground wire from the A2 terminal and the green wire from the A1 terminal on the starter/
generator.
Figure 11-19 Neutral Lockout Limit Switch Test
2m
20
m
200
m
2k
200
200
200
200
20
2
200
m
500
20k
200k
2000
k
1000
OFF
WAVETEK
5XL
V
V
V
A
!
!
COM
200nA
MAX
1000 ---
750V
FUSED
2m
20
m
200
m
2k
200
200
200
200
20
2
200
m
500
20k
200k
2000
k
1000
OFF
WAVETEK
5XL
V
V
V
A
!
!
COM
200nA
MAX
1000 ---
750V
FUSED
NO COM
TESTER LIGHT
IS OUT. METER
READS 1.
NEGATIVE (–)
PROBE
POSITIVE (+)
PROBE
NO COM
TESTER LIGHT IS
ON. METER READS
APPROXIMATELY
ZERO OHMS.
NEGATIVE (–)
PROBE
POSITIVE (+)
PROBE
NC
NC
LEVER UP
LEVER DEPRESSED
200 OHM SETTING