2006 DODGE RAM SRT-10 wiring

*HVAC SYSTEM TEST
For a complete wiring diagramRefer to Section 8W.
Theory of Operation
The HVAC System Test provides a starting point in the diagnostic process byidentifying the appropriate diagnostic
procedure or system test to perform when diagnosing a given symptom, condition, or DTC. It also provides a means
for testing the entire HVAC system byutilizing the A/C-heater control’s On-Board System Tests. The On-Board Sys-
tem Tests can also assist in diagnosing stored DTCs. (Refer to 24 - HEATING &AIR CONDITIONING - DIAGNOSIS
AND TESTING) for additional information about on-board diagnostics.
Diagnostic Test
1.HVAC SYSTEM TEST
NOTE: Diagnose and repair all active DTCs before diagnosing and repairingstored DTCs.
Make a selection based on the symptom, condition, or DTC that you want to diagnose.
For Any Active DTC
Refer to the Table of Contents in this Section for a complete list of HVAC related symptoms.
Scan Tool Indicates HVAC Not Active On Bus
(Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - DIAGNOSIS AND TESTING) for no
response related diagnostic procedures.
Blower Motor Inoperative
Refer to *Blower Motor Inoperative in this Section.
Complete HVAC System Test
Go To 2
A/C System Performance Test
Go To 2
Mode Switch & Door Actuator Ckt Test
Go To 3
Actuator DTC Detection Test
Go To 4
Actuator Calibration Test
Go To 5
2.A/C SYSTEM PERFORMANCE TEST
NOTE: The following are prerequisites of the Cooldown Test. Verify each ofthe following before running the
test:
If active, diagnose and repair Evaporator Temperature Sensor related DTCs before proceeding. Refer to
the Table of Contents in this Section for a complete list of HVAC related symptoms.
Verify that the refrigerant system has an adequate charge. Check and repair as necessary before pro-
ceeding. (Refer to 24 - HEATING & AIR CONDITIONING/PLUMBING - DIAGNOSIS ANDTESTING).
Verify that the blower motor operates correctly in all speeds. Diagnose and repair all blower related faults
before proceeding.
Verify that the work area ambient temperature is above 15.6°C (60°F) before proceeding. Move the vehicle
to a warmer work area if necessary.
Verify that the evaporator temperature is above 13°C (55°F) before proceeding.
Verify that the Mode Select control is set to the panel position.
Verify that the A/C compressor is not running. If the compressor is running, turn the A/C off and allow the
evaporator to warm up before proceeding.
NOTE: Running the AC Cooldown test will cause the A/C status indicator to flash.
NOTE: One or more status messages will display on the scan tool after running the Cooldown Test. These
messages will clear after paging back out of this test function. Therefore, it is important to note all mes-
sages before doing so.
Start the engine.
Turn the Blower control to the high speed position.

With the scan tool in HVAC, select System Tests and then select Cooldown test. Allow the test to run to completion.
Does the scan tool display a status message that indicates a fault has occurred?
Yes, Conditions Too Cold - Test Not Run
If running, turn the A/C compressor off. Verify that the work area ambient temperature is above 15.6°C
(60°F). If not, move the vehicle to a warmer work area. Verify that the evaporator temperature is above
13°C (55°F). If not, set the blower to high speed and allow the blower to run for five minutes. Then, run
the Cooldown Test again.
Yes, Blowers Not On High - Test Not Run
Set the blower speed to high speed and then run the Cooldown Test again.
Yes, No Results Stored/Test Not Complete
Verify that power is not interrupted while rerunning the Cooldown Test.
Yes, Refrigerant Temperature Sensor Error
For Dual-Zone HVAC systems, refer to B10B2–A/C COOL DOWN TEST PERFORMANCEfor the diag-
nostic test procedure. For Single-Zone HVAC systems, refer to B1079–CLIMATE CONTROL COOL
DOWN TEST EXCESSIVE TIME for the diagnostic test procedure.
Yes, DTC Set During Routine - Test Not Passed
For Dual-Zone HVAC systems, refer to B10B2–A/C COOL DOWN TEST PERFORMANCEfor the diag-
nostic test procedure. For Single-Zone HVAC systems, refer to B1079–CLIMATE CONTROL COOL
DOWN TEST EXCESSIVE TIME for the diagnostic test procedure.
No>>
Asnecessary,eitherGoTo3,4,or5,or Perform BODY VERIFICATION TEST - VER1. (Refer to 8 -
ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).
3.MODE SWITCH & DOOR ACTUATOR CIRCUIT TEST
NOTE: If at anytime a DTC becomes active during this test, proceed to the conclusion question.
NOTE: If multiple DTCs are active, diagnose those that relate to a short circuit first.
NOTE: Dual-Zone A/C Heater Controls do not set DTCs for stuck mode switches. Therefore, verify that the
A/C Heater Control is not damaged and that the mode switches and status indicators function properly and
repair as necessary before proceeding.
If not done so previously, start the engine.
Turn the Blower control to the low speed position.
Set the Blend control (single-zone) or Driver Blend control (dual-zone) to the full cold position.
If equipped, set the Passenger Blend control to the full cold position.
Monitor the scan tool for active HVAC DTCs while performing the following test steps.
If equipped, press the A/C mode switch on, wait 30 seconds, and then press itoff.
On Dual-Zone systems, press the Recirc mode switch on, wait 30 seconds, andthen press it off.
If equipped, press the EBL mode switch on, wait 30 seconds, and then press itoff.
Move the Blend control (single-zone) or Driver Blend control (dual-zone)from full cold to full hot, wait 30 seconds,
and then move it back to full cold.
If equipped, move the Passenger Blend control from full cold to full hot, wait 30 seconds, and then moved it back
to full cold.
Turn the Mode select control to the defrost position, wait 30 seconds, and then turn it to the panel position (dual-
zone) or panel / recirc position (single-zone). Wait 30 seconds before proceeding.
Does the scan tool display any active DTCs?
Ye s>>
Diagnose and repair the DTC(s). Refer to the Table of Contents in this Section for a complete list of
HVAC related symptoms.
No>>
If you are here due to a stored DTC, it is possible that a technician may not have erased the DTC
following a repair. If possible, verify if the vehicle was recently in for this type of service. Otherwise,
either Go To 4 or 5, or visually inspect the related wiring harness for chafed, pierced, pinched, and
partially broken wires and the wiring harness connectors for broken, bent, pushed out, and corroded
terminals, and repair as necessary.
Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL
MODULES - STANDARD PROCEDURE).

4.ACTUATOR DTC DETECTION TEST
NOTE: The Actuator DTC Detection Test clears all door actuator related DTCs when the test is actuated.
If not done so previously, start the engine.
With the scan tool, select System Tests and then select Actuator DTC Detection. When the test is complete, select
View DTCs.
Does the scan tool display any DTCs?
Yes, Dual-Zone
Diagnose and repair the DTC(s). If multiple DTCs are present, beginning with the passenger blend door,
diagnose and repair all short high DTCs and then all short low DTCs. Refer tothe Table of Contents in
this Section for a complete list of HVAC related symptoms.
Yes, Single-Zone
Diagnose and repair the DTC(s). If multiple DTCs are present, beginning with the common circuit, diag-
nose and repair all short high DTCs and then all short low DTCs. Refer to the Table of Contents in this
Section for a complete list of HVAC related symptoms.
No>>
If you are here due to a stored DTC, it is possible that a technician may not have erased the DTC
following a repair. If possible, verify if the vehicle was recently in for this type of service. Otherwise,
either Go To 5 or visually inspect the related wiring harness for chafed, pierced, pinched, and partially
broken wires and the wiring harness connectors for broken, bent, pushed out, and corroded terminals,
and repair as necessary.
Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL
MODULES - STANDARD PROCEDURE).
5.ACTUATOR CALIBRATION TEST
NOTE: For vehicles equipped with EBL, running the HVAC Door Recalibrationwill cause the EBL status
indicator to flash.
NOTE: The Actuator Calibration Test clears all door actuator related DTCswhen the test is actuated.
If not done so previously, start the engine.
With the scan tool, select System Tests and then select Actuator Calibration Test. When the test is complete, select
View DTCs.
Does the scan tool display any DTCs?
Ye s>>
Diagnose and repair the DTC(s). Refer to the Table of Contents in this Section for a complete list of
HVAC related symptoms.
No>>
No problem found. However, if you are here due to a stored DTC, it is possiblethat a technician may
not have erased the DTC following a repair. If possible, verify if the vehicle was recently in for this type
of service. Otherwise, visually inspect the related wiring harness for chafed, pierced, pinched, and par-
tially broken wires and the wiring harness connectors for broken, bent, pushed out, and corroded ter-
minals, and repair as necessary.
Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL
MODULES - STANDARD PROCEDURE).

Improper heater hose routing.
Plugged heater hoses or supply and return ports at the cooling system connections.
Plugged heater core.
If proper coolant flow through the cooling system is verified, and heater outlet air temperature is low, a mechanical
problem may exist.
MECHANICAL PROBLEMS
Possible locations or causes of insufficient heat due to mechanical problems are as follows:
Obstructed cowl air intake.
Obstructed heater system outlets.
Blend-air door(s) or actuator(s) not functioning properly.
Faulty blower motor system
Faulty A/C-heater control
TEMPERATURE CONTROL
If the heater outlet air temperature cannot be adjusted with the temperature control on the A/C-heater control, the
following could require service:
Faulty A/C-heater control.
Faulty blend door actuator(s).
Faulty, obstructed or improperly installed blend-air door.
Faulty related wiring harness or connectors.
Improper engine coolant temperature.
SPECIFICATIONS
A/C SYSTEM
Item Description Notes
A/C Compressor Denso 10S17 (3.7L/4.7L/5.7L/8.3L
engines)ND-8 PAG oil
Visteon HS-18 (5.9L engine) VC-46 PAG oil
Freeze–up Control Evaporator Temperature Sensor A/C evaporator mounted
High psi Control A/C pressure transducer A/C discharge line mounted
Refrigerant Charge Capacity Refer to the A/C Underhood
Specification Label located in the
engine compartment.R134a refrigerant
A/C Clutch Field Coil Draw 3.2 - 3.3 amps @ 12V ± 0.5V @
21° C (70° F)3.7L/4.7L/5.7L/8.3L engines
3.1 - 4 amps @ 12V ± 0.5V @ 21°
C(70°F)5.9L engine
A/C Clutch Air Gap 0.35 - 0.60 mm (0.014 - 0.024 in.) 3.7L/4.7L/5.7L/8.3L engines
0.35 - 0.75 mm (0.014 - 0.030 in.) 5.9L engine
TORQUE

RESISTOR-BLOWER MOTOR
DESCRIPTION
The blower motor resistor is mounted to the bottom of
the HVAC housing, directly behind the glove box. The
blower motor resistor consists of a molded plastic
mounting plate (1) with an integral wire connector
receptacle (2). Concealed behind the mounting plate
are coiled resistor wires contained within a ceramic
heat sink (3).
OPERATION
The blower motor resistor is connected to the vehicle electrical system through a dedicated wire lead and connector
of the HVAC wire harness. The blower motor resistor has multiple resistor wires, each of which will reduce the
current flow through the blower motor to change the blower motor speed.
The blower motor control for the heating-A/C system directs the ground path for the blower motor through the cor-
rect resistor wire to obtain the selected speed. With the blower motor control in the lowest speed position, the
ground path for the blower motor is applied through all of the resistor wires. Each higher speed selected with the
blower motor control applies the blower motor ground path through fewer ofthe resistor wires, increasing the blower
motor speed.
The blower motor resistor cannot be adjusted or repaired and, if faulty or damaged, it must be replaced.
DIAGNOSIS AND TESTING
BLOWER MOTOR RESISTOR
WARNING: On vehicles equipped with airbags, disable the airbag system before attempting any steering
wheel, steering column, or instrument panel component diagnosis or service. Disconnect and isolate the
negative battery (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 accidental airbag deploymentand possible personal injury or
death.
NOTE: For circuit descriptions and diagrams, refer to the appropriate wiring information. The wiring infor-
mation includes wiring diagrams, proper wire and connector repair procedures, further details on wire har-
ness routing and retention, as well as pin-out and location views for the various wire harness connectors,
splices and grounds.
1. Disconnect and isolate the negative battery cable.
2. Disconnect the wire harness connector from the blower motor resistor (Refer to 24 - HEATING & AIR CONDI-
TIONING/CONTROLS/RESISTOR-BLOWER MOTOR - REMOVAL).

5. Disconnect the wire harness connectors (1 and 3)
from the blower motor resistor (7) and the blower
motor (2).
6. Remove the screws (4)that secure the blower
motor to the HVAC housing (5) and remove the
blower motor.
7. Remove the screws (6)that secure the blower
motor resistor to the HVAC housing and remove
the resistor.
8. Disconnect the HVAC wire harness (1) from the
evaporator temperature sensor (2) and remove the
HVAC wiring harness from the HVAC housing (4).
9. Remove the air inlet housing (3) from the HVAC
housing (Refer to 24 - HEATING & AIR CONDI-
TIONING/DISTRIBUTION/HOUSING-HVAC - AIR
INLET HOUSING - REMOVAL).
10. Remove the two screws (1) that secure the panel/
floor door outlet (2) to the top of the HVAC hous-
ing (4).
NOTE: If the foam seal on the panel/floor door out-
let is deformed or damaged, it must be replaced.
11. Release the two retaining tabs (3) that secure the
panel/floor door outlet to the front of the HVAC
housing and remove the door outlet.

28. Install the air inlet housing (3) onto the top of the
HVAC housing (4) (Refer to 24 - HEATING & AIR
CONDITIONING/DISTRIBUTION/HOUSING-
HVAC - AIR INLET HOUSING - INSTALLATION).
29. Install the HVAC wire harness (1) onto the HVAC
housing. Make sure the wires are routed through
all wiring retainers.
30. Connect the HVAC wire harness to evaporator
temperature sensor (2).
31. Position the blower motor resistor (7) and the
blower motor (2) into the bottom of the HVAC
housing (5).
32. Install the screws (4 and 6) that secure the blower
motor resistor and the blower motor to the HVAC
housing. Tighten the screws to 2.2 Nꞏm (20 in.
lbs.).
33. Connect the HVAC wire harness connectors (1
and 3) to blower motor resistor and the blower
motor.
34. Position the recirculation door actuator (3) onto
the air inlet housing (4) and install the retaining
screws. Tighten the screws to 2.2 Nꞏm (20 in.
lbs.).
35. Position the mode door actuators (1) and the
blend door actuators (2) onto the HVAC housing
(5) and install the retaining screws. Tighten the
screws to 2.2 Nꞏm (20 in. lbs.).
36. Connect the HVAC wire harness connectors to the
actuators.
37. Install the HVAC housing assembly (Refer to 24 -
HEATING & AIR CONDITIONING/DISTRIBUTION/
HOUSING-HVAC - HVAC HOUSING ASSEMBLY -
INSTALLATION).

NOTE: The blower motor is supplied with a 12V feed from the TIPM, through theresistor block, whenever
the ignition switch is in the RUN position. Due to an open circuit conditionwithin the blower motor control
switch the TIPM is UNABLE to detect an OPEN circuit for the blower motor.
To determine if an open condition exists within the blower motor circuit wiring, it is necessary to disconnect the
negative battery cable and check for continuity within the blower motor circuits using an ohmmeter. For circuit
descriptions and diagrams, refer to Air Conditioning/Heater in Group 8W -Wiring Diagrams.
OPERATION
Possible causes of the blower motor not operating include:
Faulty blower motor
Faulty blower motor circuit wiring or wire harness connectors
Faulty blower motor control
Possible causes of the blower motor not operating in one or more speeds include:
Faulty blower motor resistor
Faulty blower motor circuit wiring or wire harness connectors
Faulty blower motor control
VIBRATION
Possible causes of blower motor vibration include:
Improper blower motor mounting
Improper blower wheel mounting
Deformed blower wheel
Out of balance blower wheel due to foreign material in the wheel
Faulty blower motor
NOISE
To determine if the blower motor is the source of the noise, simply switch the blower motor from Off to On. To verify
that the blower motor is the source of the noise, unplug the blower motor wire harness connector and operate the
heating-A/C system. If the noise goes away, possible causes include:
Foreign material in the HVAC air inlet housing
Improper blower motor mounting
Improper blower wheel mounting
Faulty blower motor