2011super duty blower motor replacement

RR/HVAC fuse 30amp located in the under hood fuse box. You can check it but highly doubt it's the problem . More then like it's the blower motor control module that's bad .
Circuit/System Description
The auxiliary blower motor is a variable speed fan. The HVAC control module controls the fan speed by sending a pulse width modulated signal to the auxiliary blower motor control module. The auxiliary blower motor control module varies the duty cycle across the auxiliary blower motor in relation to the pulse width modulated signal. The auxiliary blower motor speed can be adjusted from 10 percent to 90 percent duty cycle (PWM), 90 percent is high speed fan.
Watch this video for testing purpose's only , this is a front blower motor control module . Same way your back one works . GM is GM Chevy , Buick ,GMC , Cadillac .

Blower motor in engine compartment passenger firewall area, you may have to remove the cruise control servo to get motor out, very easy and straightforward job, be careful transferring the blower motor wheel over to new motor, remove lockclip first on motor shaft.

This is one of two failures either the front power transistor or the blower motor. If the power transistor is failed, then the blower motor has to be replaced also. This is a very common failure.

see the steel wire behind the speed control blower switch. it might just be loose.

The resistor block you are looking for will be close to your blower motor.There will be about 5 or 6 wires going to the block ,each a different color. When you take it out it should be about the size of a credit card and almost as thin.It is possible that Chrysler has found a new place to hide it so my suggestion is go to the dealer and buy the replacement and have them print off a diagram of the exact placement. They can vary from manufacturer to manufacturer. Sorry to say there is no heavy duty block on the market that I know of and yes,they can go very quickly sometimes.I hope this helps,good luck

Blower Motor Removal & Installation Delphi
Blower Motor Replacement (Delphi)


To Remove:

1. Remove the instrument panel sound insulator panel (if equipped).
2. Disconnect the electrical connector from the blower motor.
3. Remove the blower motor insulating cover screws.
4. Remove the blower motor insulating cover.
5. Pull the retaining tab down and rotate blower motor counterclockwise to remove.

To Install:

1. Position the blower motor and turn assembly clockwise until tab locks in place.
2. Install the blower motor insulating cover.
3. Connect the electrical connector to the blower motor.
4. Install the instrument panel sound insulator panel (if equipped).

Visteon

Blower Motor Replacement (Visteon)


To Remove:

1. Remove the instrument panel sound insulator panel (if equipped).
2. Disconnect the electrical connector from the blower motor.
3. Remove the blower motor screws.
4. Remove the blower motor from the HVAC module.

To Install:

1. Position the blower motor and install mounting screws.
2. Connect the electrical connector to the blower motor.
3. Install the instrument panel sound insulator panel (if equipped).

Not the best pic in the world, but here it is. Looks like it is under the hood, passenger side.

it's either the blower motor switch or blower motor resister. Resistor ?Heater Blower Motor Switch Removal Remove the battery (10655) ; refer to Section 414-01 . Remove the battery tray. Remove the screws. Remove the battery tray. Disconnect the heater blower motor switch resistor connector. Remove the heater blower motor switch resistor (18591). Remove the two screws. Remove the heater blower motor switch resistor. ----------------------------------- Switches Removal Disconnect the battery ground cable. Remove the center trim panel; refer to Section 501-12 . Remove the control assembly. Remove the screws. Remove the control assembly. Remove the A/C-heater function selector switch knob. Disconnect the vacuum harness connector. Disconnect the A/C-heater function selector switch connector. Remove the A/C-heater function selector switch. Remove the screw. Remove the A/C-heater function selector switch. Remove the temperature control switch knob. Disconnect the temperature control switch connector. Remove the temperature control switch. Remove the screw. Remove the temperature control switch. Remove the heater blower motor switch knob. Disconnect the heater blower motor switch connector. Remove the heater blower motor switch (18578). Remove the screw. Remove the heater blower motor switch. ----------------------------

If it's the blower motor,the vacuum pump has to be moved out of the way(10 mm bolts) . There are three or four 8mm bolts holding the motor in place. make sure you have power and ground to blower motor before replacing.

I took my truck in and they removed the blower and cleaned it now works great did not need to replace it.