plastic inside the glove box opening, next to the left-
side energy-absorbing bracket (Fig. 1). Refer to the
PDC label for blower motor relay identification and
location.
The blower motor relay (VRR) cannot be repaired
and, if faulty or damaged, it must be replaced.
BLOWER MOTOR RESISTOR
FRONT
DESCRIPTION
During vehicle assembly, the blower motor resistor
is mounted to the dash plenum panel inside the pas-
senger compartment prior to instrument panel
roll-up (Fig. 2). However, a resistor mounting plate
has been designed so that the resistor can be
removed through an access hole in the cowl plenum
panel just below the windshield. It can be accessed
by removing the cowl plenum cover/grille panel. See
Blower Motor Resistor in the Removal and Installa-
tion section of this group for more information.
OPERATION
The resistor has multiple resistor wires, each of
which will change the resistance in the blower motor
ground path to change the blower motor speed. The
blower motor switch directs the ground path through
the correct resistor wire to obtain the selected blower
motor speed.
With the blower motor switch in the lowest speed
position, the ground path for the motor is applied
through all of the resistor wires. Each higher speed
selected with the blower motor switch applies the
blower motor ground path through fewer of the resis-
tor wires, increasing the blower motor speed. When
the blower motor switch is in the highest speed posi-
tion, the blower motor resistor is bypassed and the
blower motor receives a direct path to ground
through the high speed blower motor relay.
The blower motor resistor cannot be repaired and,
if faulty or damaged, it must be replaced.
REAR
DESCRIPTION
The blower motor resistor for the optional rear
overhead A/C unit is located within the unit housing.
The resistor has multiple resistor wires, each of
which will change the resistance in the blower motor
ground path to change the blower motor speed. The
blower motor switch directs the ground path through
the correct resistor wire to obtain the selected blower
motor speed.
OPERATION
With the blower motor switch in the lowest speed
position, the ground path for the motor is applied
through all of the resistor wires. Each higher speed
selected with the blower motor switch applies the
blower motor ground path through fewer of the resis-
tor wires, increasing the blower motor speed. When
the blower motor switch is in the highest speed posi-
tion, the blower motor resistor is bypassed and the
blower motor receives a direct path to ground.
Fig. 1 Blower Motor Relay (VRR) Location
1 – BLOWER MOTOR RESISTOR CONNECTOR
2 – BLOWER MOTOR RELAY
3 – BLOWER MOTOR CONNECTOR
4 – GLOVE BOX LAMP CONNECTOR
Fig. 2 Blower Motor Resistor - Factory Installation
1 – PLENUM PANEL
2 – SCREW
3 – RESISTOR
4 – CONNECTOR
5 – SCREW
6 – RESISTOR MOUNTING PLATE
DN HEATING AND AIR CONDITIONING 24 - 3
DESCRIPTION AND OPERATION (Continued)
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