TROUBLESHOOTING
Test Procedures
Page 11-26 2000 FE290 Gasoline Vehicle Maintenance and Service Supplement
11
Test Procedure 8, Continued:
- An incorrect reading from 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.
5. Using a multimeter set to 200
Ω
(ohms), place the red (+) probe on the A1 terminal and the black (–)
probe on the A2 terminal. The reading should be continuity. If the reading is incorrect, a possible open
or poor contact in a brush assembly and/or open armature windings may be the cause. The starter/
generator will need to be removed from the vehicle and disassembled by a qualified technician. See
Starter/Generator Removal, Section 12 – Electrical Components, Page 12-2.
6. With the wires still disconnected, using a multimeter set on 200
Ω
(ohms), place the red (+) probe on
the F1 terminal and the black (–) probe on the F2 terminal. The reading should be between
approximately .1 and .3
Ω
(ohms). If the reading is incorrect, a possible open field coil or bad
connections at terminals may be the cause. The starter/generator will need to be removed from the
vehicle and disassembled by a qualified technician See Starter/Generator Removal, Section 12 –
Electrical Components, Page 12-2.
7. With the wires still disconnected, using a multimeter set on 200
Ω
(ohms), place the red (+) probe on
the DF terminal and the black (–) probe on the F1 terminal. The reading should be between 4.5 and
5.5
Ω
(ohms).If the reading is incorrect, a possible grounded DF terminal and/or grounded field coil
may be the cause. The starter/generator will need to be removed from the vehicle and disassembled
by a qualified technician See Starter/Generator Removal, Section 12 – Electrical Components,
Page 12-2.
Figure 11-33 Check Terminal Continuity
Figure 11-34 Jumper Wire Ground – DF to A2
2m
20
m
200
m
2k
200
200
200
200
20
2
200
m
500
20k
200k
2000
k
Ω
Ω
1000
OFF
WAVETEK
5XL
V
V
V
A
!
!
COM
200mA
MAX
1000 ---
750V
FUSED
F2
DF
F1
A2
A1
YELLOW
WIRE
STARTER /
GENERATOR
YELLOW
WIRE
JUMPER
WIRE
STARTER /
GENERATOR
F2
DF
F1
A2
A1
