ELECTRICAL COMPONENTS
Starter/Generator
Page 12-8
2005 FE290 Gasoline Vehicle Maintenance and Service Supplement
12
A
Armature Ground Test
ý
CAUTION
• Do not submerge armature in solvent.
NOTE:
Before testing, wipe the armature with a clean cloth and remove carbon dust and metal particles
from between commutator bars.
1. Using a multimeter set on 200 (ohms), place the positive (+) probe on the commutator bars and the neg-
ative (–) probe on the armature core. The reading should be no continuity. If the reading is incorrect,
replace the armature and the two bearings
(Figure 12-12, Page 12-8)
.
Figure 12-11 Inspect Commutator
Figure 12-12 Armature Ground Test
A
2
A
B
B
A
1
1
1
1
A
1
Measure each position
in two places 90 apart.
COMMUTATOR
ARMATURE
ARMATURE SHAFT
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
200mA
MAX
1000 ---
750V
FUSED
