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Makes 🢒 Chevrolet 🢒 1997 🢒 Corvette 🢒 HVAC 🢒 HVAC Systems - Manual 🢒 Blower Motor Inoperative at Any Speed

Blower Motor Inoperative at Any Speed <<C60>>

Step

Action

Value(s)

Yes

No

DEFINITION: Blower motor is inoperative at any selected speed.

1

Were you sent here from the HVAC Blower Controls System Check (C60)?

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Go to Step 2

Go to HVAC Blower Controls System Check (C60)

2
  1. Disconnect the blower motor connector.
  2. Turn the ignition switch to the ON position.
  3. Place the HVAC mode switch in the UPPER position.
  4. Turn the blower switch to the LO position.
  5. Connect a DMM between terminal A of the blower motor connector and a known good ground.
  6. Measure the available voltage at the terminal A of the blower motor connector.

Is the voltage within the specified values?

10.0 -14.0V

Go to Step 3

Go to Step 10

3
  1. Connect a DMM between a good ground and terminal B of the blower motor connector.
  2. Measure CKT 150 for continuity to ground.

Is CKT 150 continuous to ground?

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Go to Step 4

Go to Step 5

4

Replace the blower motor.

Is the repair complete?

--

Go to HVAC Blower Controls System Check (C60)

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5
  1. Disconnect the blower motor control module connector C2.
  2. Connect a DMM between the blower motor control module connector C2 terminal 2 and a good ground.
  3. Measure CKT 150 for continuity to ground.

Is CKT 150 continuous to ground?

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Go to Step 6

Go to Step 7

6

Locate and repair an open or a high resistance in CKT 150 between the blower motor connector and the blower motor control module connector C2.

Is the repair complete?

--

Go to HVAC Blower Controls System Check (C60)

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7
  1. Disconnect the blower motor control module connector C1.
  2. Connect a DMM between the blower motor control module connector C1 terminal E and a good ground.
  3. Measure CKT 150 for continuity to ground.

Is CKT 150 continuous to ground?

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Go to Step 8

Go to Step 9

8

Replace the blower motor control module.

Is the replacement complete?

--

Go to HVAC Blower Controls System Check (C60)

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9

Locate and repair an open or a high resistance in CKT 150 between the blower motor control module connector C1 and G202.

Is the repair complete?

--

Go to HVAC Blower Controls System Check (C60)

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10
  1. Disconnect the blower motor relay.
  2. Connect a DMM between the blower motor relay connector terminal A1 and a good ground.
  3. Measure CKT 150 for continuity to ground.

Is CKT 150 continuous to ground?

--

Go to Step 12

Go to Step 11

11

Locate and repair an open or a high resistance in CKT 150 between the blower motor connector and the blower motor control module connector C2.

Is the repair complete?

--

Go to HVAC Blower Controls System Check (C60)

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12
  1. Connect a DMM between the blower motor relay connector terminal C2 and a good ground.
  2. Turn the ignition switch to the ON position.
  3. Measure the available voltage at the blower motor relay connector terminal C2.

Is the voltage within the specified values?

10.0 -14.0V

Go to Step 16

Go to Step 13

13

Check the HVAC MiniFuse® #18 for an open circuit.

Is the fuse open?

--

Go to Step 14

Go to Step 15

14

Locate and repair an open or a high resistance in CKT 41 between the blower motor relay connector and the instrument panel electrical center.

Is the repair complete?

--

Go to HVAC Blower Controls System Check (C60)

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15

Locate and repair a short to ground in CKT 41 between the blower motor relay connector and the instrument panel electrical center.

Is the repair complete?

--

Go to HVAC Blower Controls System Check (C60)

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16
  1. Connect a DMM between the blower motor relay connector terminal C1 and a good ground.
  2. Measure the available voltage at the blower motor relay connector terminal C1.

Is the voltage within the specified values?

10.0 -14.0V

Go to Step 20

Go to Step 17

17

Check the BLO MOT MiniFuse® #49 for an open circuit.

Is the fuse open?

--

Go to Step 18

Go to Step 19

18

Locate and repair an open or a high resistance in CKT 1342.

Is the repair complete?

--

Go to HVAC Blower Controls System Check (C60)

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19

Locate and repair a short to ground in CKT 1342.

Is the repair complete?

--

Go to HVAC Blower Controls System Check (C60)

--

20
  1. Connect a fused jumper wire between the blower motor relay connector terminal C1 and terminal A2.
  2. Turn the blower motor fan switch to the low position.

Does the blower motor operate?

--

Go to Step 21

Go to Step 22

21

Replace the blower motor relay.

Is the replacement complete?

--

Go to HVAC Blower Controls System Check (C60)

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22
  1. Fused jumper wire is still connected between the blower motor relay connector terminal C1 and terminal A2.
  2. Disconnect the HVAC control head connector C2.
  3. Connect a DMM between the HVAC control head connector C2 terminal B and a good ground.
  4. Measure the available voltage at the HVAC control head connector C2 terminal B.

Is the voltage within the specified values?

10.0 -14.0V

Go to Step 24

Go to Step 23

23

Locate and repair an open or a high resistance in CKT 42.

Is the repair complete?

--

Go to HVAC Blower Controls System Check (C60)

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24
  1. Connect the blower motor connector.
  2. Connect the blower motor control module connectors C1 and C2.
  3. Fused jumper wire is still connected between the blower motor relay connector terminal C1 and terminal A2.
  4. Connect a fused jumper wire between terminal B and terminal H of the HVAC control head connector C2.

Does the blower motor operate?

--

Go to Step 25

Go to Step 26

25

Replace the HVAC control head.

Is the replacement complete?

--

Go to HVAC Blower Controls System Check (C60)

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26

Replace the blower motor control module .

Is the replacement complete?

--

Go to HVAC Blower Controls System Check (C60)

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