Armature Test

WARNING: This page is about a different car, the 2002 Isuzu Trooper. However, it is still accessible from the selected car via links, so may be relevant.

Measure the outer diameter of commutator, and replace with a new one if it is out of limit. See Fig 1 . See STARTER SPECIFICATIONS .
Check for continuity between segment and segment. Replace commutator if there is no continuity. See Fig 2 .
Check for continuity between commutator and shaft. Also, check for continuity between commutator and armature core, armature core and shaft. Replace commutator if there is continuity. See Fig 3 .
Measure runout of armature core and commutator with a dial gauge. SeeFig 4 . Repair or replace, if it exceeds the limit. See STARTER SPECIFICATIONS .
Polish commutator surface with sandpaper #500 to #600 if it is rough. See Fig 5 .
Measure the depth of insulator in commutator. Replace, if it is below the limit. See Fig 6 . See STARTER SPECIFICATIONS .

Fig 1: Measuring Outer Diameter Of Commutator

Courtesy of ISUZU MOTOR CO.

Fig 2: Checking Continuity Between Segment & Commutator

Courtesy of ISUZU MOTOR CO.

Fig 3: Checking Continuity Between Commutator & Shaft

Courtesy of ISUZU MOTOR CO.

Fig 4: Checking Runout Of Commutator With Dial Gauge

Courtesy of ISUZU MOTOR CO.

Fig 5: Using Sandpaper To Polish Commutator Surface

Courtesy of ISUZU MOTOR CO.

Fig 6: Measuring Depth Of Insulator In Commutator

Courtesy of ISUZU MOTOR CO.