Was the Blower Controls System Check performed?

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Go to Step 2

Go to Blower Controls System Check

Inspect HEATER BLOWER fuse 33.

Is the fuse open?

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Go to Step 3

Go to Step 4

Test CKT A465 or the circuit to the A/C compressor relay for a short to ground.

Is there a short to ground in one of the circuits?

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Go to Step 5

Go to Step 6

Test for voltage at the HEATER BLOWER fuse block terminal (one terminal is hot at all times).

Is the voltage within the specified value?

B+

Go to Step 7

Go to Step 8

Repair the short to ground. Refer to Wiring Repairs.

Is the repair complete?

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Go to Step 6

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Replace the HEATER BLOWER fuse.

Is the replacement complete?

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Go to Blower Controls System Check

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1. Reinstall the HEATER BLOWER fuse.
2. Connect the negative lead of the DMM to terminal 3 of the blower controller.
3. With the positive lead measure the voltage at terminal 1 of the controller.

Is the voltage within the specified value?

B+

Go to Step 9

Go to Step 10

Locate and repair the open voltage feed circuit. Refer to the Power Distribution schematics.

Is the repair complete?

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Go to Blower Controls System Check

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1. Turn the ignition switch to the ON position.
2. Measure the voltage at terminal 6 (motor+).

Is the voltage within the specified value?

B+

Go to Step 11

Go to Step 12

1. Move the negative lead of the DMM to another ground location.
2. Re-measure the voltage at terminal 1.

Is the voltage within the specified value?

B+

Go to Step 13

Go to Step 14

1. Disconnect the blower motor ground (BRN wire) from the blower controller.
2. Connect a fused jumper wire between the BRN wire and ground.
3. Turn the ignition switch to the ON position.

Does the blower motor operate?

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Go to Step 12

Go to Step 15

Replace the blower controller.

Is the replacement complete?

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Go to Blower Controls System Check

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Locate and repair the open in CKT F812 (BLK).

Is the repair complete?

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Go to Blower Controls System Check

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Locate and repair the open in CKT A465 (RED).

Is the repair complete?

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Go to Blower Controls System Check

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Replace the blower motor.

Is the replacement complete?

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Go to Blower Controls System Check

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