Blower Motor High Speed Inoperative. Buick GL7 (Export) 2000

For 1990-2009 cars

## Blower Motor High Speed Inoperative Front

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---
1 | Did you review the Blower Controls Circuit Description and perform the necessary inspections? | -- | Go to Step 2 | Go to Symptoms
2 | Verify that the front blower motor high speed is inoperative. Does the front blower motor operate normally? | -- | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3

3

1. Disconnect the blower motor resistor.
2. Connect a test lamp between the blower motor resistor connector terminal G and ground. Refer to Circuit Testing in Wiring Systems.

Is the test lamp on?

--

Go to Step 4

Go to Step 5

4

1. Turn the ignition switch to the RUN position.
2. Turn the heater-A/C control to the high position.
3. Connect a test lamp between the blower motor resistor terminal F and ground. Refer to Circuit Testing in Wiring Systems.

Is the test lamp on?

--

Go to Step 6

Go to Step 7

5 | Check for a short to ground in circuit 40. Refer to Circuit Testing in Wiring Systems. Is a short to ground present? | -- | Go to Step 10 | Go to Step 11
6 | Replace the blower motor resistor. Refer to Blower Motor Resistor Replacement . Is the repair complete? | -- | Go to Step 12 | --
7 | Connect the test lamp between the heater-A/C control connector C1 terminal C and ground. Refer to Circuit Testing in Wiring Systems. Is the test lamp on? | -- | Go to Step 8 | Go to Step 9
8 | Repair the poor connection or open in circuit 52. Refer to Wiring Repairs or Connector Repairs in Wiring Systems. Is the repair complete? | -- | Go to Step 12 | --
9 | Replace the heater-A/C control. Refer to HVAC Module Assembly Replacement . Is the repair complete? | -- | Go to Step 12 | --
10 | Repair the short to ground in circuit 40. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Step 12 | --
11 | Repair the poor connection or open in circuit 40. Refer to Wiring Repairs or Connector Repairs in Wiring Systems. Is the repair complete? | -- | Go to Step 12 | --

12

1. Turn the ignition switch to the OFF position.
2. Reconnect all connectors/components removed.
3. Operate the system in order to verify the repair.

Did you correct the condition?

--

System OK

Go to Step 3