Monday, February 8, 2010

2004 DODGE RAM 1500 I HAVE NO AIR COMING OUT OF MY VENTS. GETTING A CODE OF P0480 Cooling Fan 1 Control Circui?

P0480 Cooling Fan 1 Control Circuit Relay please help...when i tilt my steering wheel the air would come on and off but now nothing comes out.2004 DODGE RAM 1500 I HAVE NO AIR COMING OUT OF MY VENTS. GETTING A CODE OF P0480 Cooling Fan 1 Control Circui?
There was a wiring problem with the wiring for the blower as it came from the ignition switch. If you check with a dealer and provide your vehicle ID number they can tell you if there is a T.S.B. (technical service bulletin) which provides the instructions for a wiring overlay. Good Luck.2004 DODGE RAM 1500 I HAVE NO AIR COMING OUT OF MY VENTS. GETTING A CODE OF P0480 Cooling Fan 1 Control Circui?
SYMPTOM


P0480-COOLING FAN NO.1 CONTROL CIRCUIT





WHEN MONITORED


With the ignition on. Battery voltage greater than 10.4 volts . Fuel Delivery mode is run.





SET CONDITION


The state of the Output does not agree with the control state for 2.7 seconds . One Trip Fault. Three good trips to turn off the MIL.





POSSIBLE CAUSES








Condenser fan relay operation


Internal (A16) fused B+ circuits


Condenser fan relay resistance


(K173) Condenser fan relay control circuit open


(K173) Condenser fan relay control circuit shorted to ground


PCM








This is actually one of your fans under the hood and not the fan that blows in the vehicle.


That problem could be a fuse, fuse block or the fan motor itself. It could also be the multifunction switch (blinker switch) as the circuit may run through the ignition.





WARNING: ON VEHICLES EQUIPPED WITH AIR-BAGS, DISABLE THE AIRBAG SYSTEM BEFORE ATTEMPTING ANY STEERING WHEEL, STEERING COLUMN, OR INSTRUMENT PANEL COMPONENT DIAGNOSIS OR SERVICE. DISCONNECT AND ISOLATE THE BATTERY NEGATIVE (GROUND) CABLE, THEN WAIT TWO MINUTES FOR THE AIRBAG SYSTEM CAPACITOR TO DISCHARGE BEFORE PERFORMING FURTHER DIAGNOSIS OR SERVICE. THIS IS THE ONLY SURE WAY TO DISABLE THE AIRBAG SYSTEM. FAILURE TO TAKE THE PROPER PRECAUTIONS COULD RESULT IN AN ACCIDENTAL AIRBAG DEPLOYMENT AND POSSIBLE PERSONAL INJURY.











Check for battery voltage at the fuse in the Power Distribution Center (PDC). If OK, go to Step 2. If not OK, repair the shorted circuit or component as required and replace the faulty fuse.


Turn the ignition switch to the Off position. Disconnect and isolate the battery negative cable. Remove the A/C-heater control from the instrument panel. Check for continuity between the ground circuit cavity of the A/C-heater control wire harness connector and a good ground. There should be continuity. If OK, go to Step 3. If not OK, repair the open circuit to ground as required.


With the A/C-heater control wire harness connector disconnected, place the A/C-heater mode control switch in any position except the Off position. Check for continuity between the ground circuit terminal and each of the blower motor driver circuit terminals of the A/C-heater control as you move the blower motor switch to each of the four speed positions. There should be continuity at each driver circuit terminal in only one blower motor switch speed position. If OK, test and repair the blower driver circuits between the A/C-heater control connector and the blower motor resistor as required. If not OK, replace the faulty A/C-heater control.





CAUTION: Stay clear of the blower motor resistor block heat sink (Hot). Do not operate the blower motor with the resistor block removed.





Blower Motor Resistor Block























Disconnect and isolate the negative battery cable.


Reach under the instrument panel near the blower motor and disconnect the wire harness connector from the blower motor resistor block.


Remove the two screws that secure the blower motor resistor block to the HVAC housing.


Remove the resistor block from the HVAC housing.


INSTALLATION








Position the blower motor resistor block into the HVAC housing.


Install the two screws that secure the resistor block to the HVAC housing. Tighten the screws to 2.2 Nm (20 in. lbs.) .


Connect the wire harness connector to the resistor block.


Reconnect the battery negative cable.








NOTE: The blower motor is located on the passenger side of the vehicle under the instrument panel. The blower motor can be removed from the vehicle without having to remove the HVAC housing.











Disconnect and isolate the battery negative cable.


Disconnect the wire harness connector from the blower motor.


HVAC Blower Motor - Typical























Remove the three screws that secure the blower motor to the HVAC housing.


Remove the blower motor from the HVAC housing by rotating and tilting the blower motor as needed for clearance.


INSTALLATION








Align and install the blower motor into the HVAC housing.


Install the three screws that secure the blower motor to the HVAC housing. Tighten the screws to 2.2 Nm (20 in. lbs.).


Connect the wire harness connector to the blower motor.


Reconnect the battery negative cable.





You could have a problem with the blend doors as well. Are you getting any air from any vent?
sounds like an ignition switch...thats probably causing your fault code also.

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