DEFINITION: Generator check: grounds, shorts, and opens

Connect the ohmmeter to the slip ring and a clean metal grounding surface on the frame of the rotor to check for grounds.

Does the ohmmeter read infinity?

Infinity

Go to Step 2

Go to Step 3

Connect the ohmmeter to both slip rings to check for opens and shorts.

Does the ohmmeter read within the given specifications?

1.7-2.1 ohms

Go to Step 4

Go to Step 3

Replace the rotor. Refer to Generator Disassemble .

Does the ohmmeter read infinity?

Infinity

Go to Step 2

Go to Step 1

Connect the ohmmeter to the stator terminal and to a clean metal ground on the laminations to check for continuity. Is there continuity?

Continuity

Go to Step 8

Go to Step 5

1. Connect the ohmmeter to the grounded heat sink and each of the flat metal clips at the rectifier bridge terminals.
2. Reverse the leads.

One reading should be high (open) and one low (continuity). Are the readings the same?

One high/one low

Go to Step 7

Go to Step 6

1. Connect the ohmmeter to the insulated heat sink and each of the flat metal clips at the rectifier bridge terminals.
2. Reverse the leads.

Are the readings the same?

One high/one low

Go to Step 7

System OK

Replace the rectifier bridge. Refer to Generator Disassemble .

Is the repair complete?

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System OK

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Replace the stator. Refer to Generator Disassemble .

Is there continuity?

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System OK

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