1. Disconnect the generator connector.
2. Attach the fused jumper from the generator connector terminal L to the ground.
3. Turn the ignition switch ON.

Is the Volts or Check Gauge indicator ON?

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Go to Step 6

Go to Step 2

1. Disconnect the C205 connector.
2. Install a DVM to the ground at the terminal C of connector C205 (engine side).

Is continuity present?

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Go to Step 3

Go to Step 7

Install a fused jumper wire from the ground to the instrument connector C1 (Chev) or C2 (Buick) CKT25 (leave the cluster connected).

Is the Volts or Check Gauge indicator ON?

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Go to Step 8

Go to Step 4

Using a DVM to ground, check for B+ at the instrument cluster connector C2 terminal A11 (CHecv) or A9 (Buick).

Is B+ present?

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Go to Step 9

Go to Step 5

1. Repair the open in CKT39.
2. IF OK, repair B+ to I/P INDC fuse 11.

Is the repair complete?

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System OK

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1. Check for poor connection at the generator terminal L.
2. If OK, repair or replace the generator. Refer to Generator Replacement .

Is the repair complete?

--

System OK

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Repair the open in CKT25 from connector C205 to terminal L of the generator connection.

Is the repair complete?

--

System OK

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Repair the open in CKT25 from instrument cluster to connector C205.

Is the repair complete?

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System OK

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1. Check the connections at the instrument cluster.
2. If OK, check the Volts or Check Gauge indicator bulb.
3. If OK, service the instrument cluster.

Is the repair complete?

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System OK

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