For 1990-2009 cars

The following components, when used in combination, determine the blower speed:

• | The blower resistor.

• | The blower switch.

The blower resistor consists of 3 resistors located in the same housing.

With the blower switch in LO, the following actions occur:

• | The blower circuit uses all 3 resistors.

• | The blower motor runs at the lowest speed.

With the blower switch in M1, the following actions occur:

• | Two of the resistors are in use.

• | The blower motor runs faster.

With the blower switch in M2, the following actions occur:

• | Only one of the resistors is in use.

• | The blower motor runs even faster.

With the blower switch in HI, the following actions occur:

• | None of the resistors are in use.

• | The blower motor runs at maximum speed.