GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 1999 🢒 Park Avenue 🢒 HVAC 🢒 HVAC Systems - Automatic 🢒 Blower Motor Always On

Blower Motor Always On for Buick Park Avenue 1999

Step

Action

Value(s)

Yes

No

1
  1. Turn the ignition to the OFF position.
  2. Disconnect the blower motor connector and measure the voltage between terminal A and terminal  B at the blower control module output.

Refer to Measuring Voltage in Wiring Systems.

Does the voltage equal the specified value?

0 V

Go to Step 2

Go to Step 4

2

Reconnect the blower motor connector.

Does the blower motor run?

--

Go to Step 3

System OK

3

Replace the blower motor. Refer to Blower Motor and Fan Replacement .

Is the repair complete?

--

System OK

--

4

Measure the voltage at terminal C of the blower control module input.

Refer to Measuring Voltage in Wiring Systems.

Does the voltage equal the specified value?

5 V

Go to Step 5

Go to Step 6

5

Replace the blower control module. Refer to Blower Motor Control Module Replacement .

Is the repair complete?

--

System OK

--

6

Replace the HVAC programmer. Refer to Programmer Replacement .

Is the repair complete?

--

System OK

--