Durango 4WD V8-5.9L VIN Z (1998)
Blower Motor Relay: Description and Operation
High Speed Blower Motor Relay
High Speed Blower Motor Relay
The front blower motor electrical circuit uses a high speed blower motor relay. The high speed blower motor relay is a International Standards
Organization (ISO)-type relay The relay is a electromechanical device that switches the blower motor to ground, bypassing the remainder of the
blower motor feed circuit.
The high speed blower motor relay is energized when the relay coil is provided a ground signal by the blower motor switch, and a battery feed
from the ignition switch. When the relay is de-energized, the front blower motor ground feed is routed through the front blower motor switch and
the blower motor resistor. See High Speed Blower Motor Relay in the Diagnosis and Testing for more information.
The high speed blower motor relay is located in the relay and fuse block, which is attached to the back of the junction block, under the left side of
the instrument panel in the passenger compartment. The high speed blower motor relay cannot be repaired and, if faulty or damaged, it must be
replaced.
