Blower Motor Operates at High Speed Only. Buick GL7 (Export) 2000

For 1990-2009 cars

## Blower Motor Operates at High Speed Only 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 operates at high speed only. 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. Place the ignition switch in the RUN position.
2. Place the heater-A/C control in the low position.
3. Probe with a test lamp between the blower motor resistor connector terminal B and ground. Refer to Circuit Testing in Wiring Systems.

Is the test lamp on?

--

Go to Step 4

Go to Step 5

4 | Replace the blower motor resistor. Refer to Blower Motor Resistor Replacement . Is the repair complete? | -- | Go to Step 6 | --
5 | Replace the heater-A/C control. Refer to HVAC Module Assembly Replacement . Is the repair complete? | -- | Go to Step 6 | --

6

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