Component Testing and Adjustment 7-21TP-5606 6/02
Checking Three-Phase Stator
Continuity and Resistance
1. To check stator continuity, set ohmmeter on R x 1
scale. Contact the red and black meter leads;
adjust ohmmeter to zero ohms. Check stator
continuity by connecting meter leads to stator
leads.
NOTE
Disconnect all stator leads prior to performing
stator continuity tests.
Leads 1, 2, 3, and 4 are the generator output leads.
Leads 55 and 56 are the voltage regulator power supply.
Leads B1 and B2 are the generator output interlock
circuit for the controller. Refer to the schematic in
Figure 7-18 when performing the following tests.
D There must be continuity between leads 1 and 4.
D There must be continuity between leads 2 and 5.
D There must be continuity between leads 3 and 6.
D There must be continuity between leads 7 and 10.
D There must be continuity between leads 8 and 11.
D There must be continuity between leads 9 and 12.
D There must be continuity between leads 55 and 66.
D There must be continuity between leads B1 and
B2.
D There must be NO continuity between lead 1 and
leads 2, 3, 5, 6, 7, 8, 9, 10, 11, 12, 55, 66, B1, or B2.
D There must be NO continuity between lead 2 and
leads 3, 6, 7, 8, 9, 10, 11, 12, B1, B2, 55, or 56.
D There must be NO continuity between lead 3 and
leads 7, 8, 9, 10, 11, 12, B1, B2, 55, or 56.
D There must be NO continuity between lead 7 and
leads 8, 9, 11, 12, B1, B2, 55, or 56.
D There must be NO continuity between lead 8 and
leads 9, 12, B1, B2, 55 or 56.
D There must be NO continuity between lead 9 and
leads B1, B2, 55 or 56.
D There must be NO continuity between lead B1 and
leads 55 or 56.
D There must be NO continuity between any stator
lead and ground on stator housing or frame
laminations.
D If any check fails, the stator must be repaired or
replaced.
7
10
8
11
9
12
55
66
1
4
2
5
3
6
B1
B2
Figure 7-18. Stator Resistance Check
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