RAM 2500 Van V8-5.2L Prop VIN 2 (2000)
Blower Motor Relay: Description and Operation
High Speed Blower Motor Relay
Front
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.
The front high speed blower motor relay is located in the engine compartment, on a bracket that is secured under one of the screws for the top cover on
the inboard side of the heater-A/C housing. The high speed blower motor relay cannot be repaired and, if faulty or damaged, it must be replaced.
Rear
HIGH SPEED BLOWER MOTOR RELAY
The optional rear heater-A/C unit 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 rear blower motor ground feed is routed through the rear blower motor switch and the blower motor
resistor.
The rear high speed blower motor relay is located in a connector that is secured to the back of the rear heater-A/C unit housing in the passenger
compartment.
The rear high speed blower motor relay cannot be repaired and, if faulty or damaged, it must be replaced.
