How to replace the fuse for the power folding mirrors

so did not scan the PCM to learn why it fails?
we never ever skip scans today modern cars MUST be scanned first
after fuses all good (endless posted here same words )

outside mirror electrics seen in the service manual
I am reading it now
left side front fails
the mirror runs off the DDS, model, driver door switch controls
so mirror left//right up down work but the fold motor is dead

well the DDS is bad or the wires to it are bad
or comms fail. not scanning the PCm/BCM means not seeing errors.
the DDS has 4 switches
2 for extend and retract
and 2 to drive the motor, so 4 wires there. can fail.

I say DDS is bad. or connectors rusty or wiring damage there.

ebay parts or worse amazon.
?
or wrong parts ordered.

if not the fuse.. try to disconnect the control at the mirror adjust button on the drivers side of the vehicle..there will also be a control relay somewhere too..

Does the other side mirror work?

If the other side mirror adjusts with the switch, then it could be an issue with the mirror which isn't working.
Usually a mirror has two motors, one for up/down and another for left/right. If the mirror works in one direction and not in the other, yet the mirror on the other side works in all directions, then the issue is not the switch, but the mirror.

Unless none of that is relevant and you are talking about the fold function.

If neither mirror folds when you depress the fold button, then you need to check or change the switch as the most likely cause of the issue.
If you can provide me with a picture of the switch, then I can try to advise on how to remove and replace it.

the cable that controls the mirror is more than likely broken or if it's gear driven the gear is stripped or broke. I would first try to take the switch apart and clean it

The wiring harness to the mirrors is likely rubbed through, pull the door panel off on the driver side first and check the mirror harness.

{: ) Have someone control the power fold buttons, while you check closely the passenger mirror. If you can feel or hear even a faint hum of the motor while commanded, try giving it a little help, but don't force it if you think it doesn't have enough power to extend or retract itself. The motor could be really stuck or inoperative.
Sometimes when the mirror has been accidentally or manually folded, it needs to be reset by just pressing on the fold buttons a few rounds and let the mirrors fold by itself. Like an exercise.
If you hear the humming noise whenever the fold buttons are pressed, we can assume that the circuit on that side is ok since it is responding electrically, and that a jammed or stuck mechanism is preventing it to move.
If you don't feel or hear any humming, as in totally no sign of response, then there will be additional considerations before deciding to go for a replacement mirror. You will need to confirm if the fault is on the wirings, a door module, or the mirror motor itself. A scan tool test may be recommended for effective diagnosis.
The power fold mirror can be serviced as an assembly. So, goodluck.

2003 GMC Yukon - My power mirrors stopped working.... all fuses have been checked and they are all good. Any ideas? These are the power folding mirrors. The function that allows you to fold them in for car washes etc still works.... they just will not adjust when you change drivers, or when you try to adjust them with the controls. Any ideas would be appreciated!

The power mirrors are controlled by a module (computer) DDM - drivers door module an the PDM - passenger door module .
Folding Mirror System
Folding Mirror System Controls
The folding mirror system requires signals from 2 separate switches. The mirror select switch must be in the neutral/fold position and the mirror direction switch must be activated to the left/extend or right/retract positions. Both switches are integrated into the DDM and provide direct signals.
Folding Mirror System Operation
Upon receipt of the required switch inputs the DDM will supply battery voltage and ground to the mirror fold motor control circuits to perform the requested extend or retract function. The DDM will also send a class 2 message to the PDM indicating the requested function. The PDM will supply battery voltage and ground to the mirror fold motor control circuits to perform the requested extend or retract function.

Power Mirror System
Power Mirror System Components
The power mirror system consists of the following components:
• The driver door module--Class 2 module with integrated switches and requires programming when replaced
• The passenger door module--Class 2 module with integrated switches, requires programming when replaced and also contains the RFA receiver
• The power mirror direction switch--Integrated into DDM and is a 4-position momentary switch that provides a signal input to the DDM for up, down, left/extend and right/retract with a mirror switch activation
• The mirror select switch--Integrated into DDM and is a 3-position switch that allows the operator to select the left or right mirror and also a neutral/fold position
• The left outside power mirror--Contains both the vertical and horizontal mirror motors and is serviced as a complete mirror assembly
• The right outside power mirror--Contains both the vertical and horizontal mirror motors and is serviced as a complete mirror assembly
• The body control module--Class 2 module that requires programming when replaced, serves as the power mode master and is the main message handler
• The DDM 10A fuse--Located in the I/P fuse block and is hot at all times
• The PDM 10A fuse--Located in the I/P fuse block and is hot at all times
• The memory switch, if equipped with memory mirrors--Supplied power by the DDM and provides a voltage signal to the DDM upon a switch activation
• The horizontal and vertical position sensors, if equipped with memory mirrors--Supplied a 5-volt and low reference by the DDM/PDM and provide a variable voltage signal to the DDM/PDM that is proportional to mirror position
• The park neutral position switch, if equipped with memory mirrors--Provides transmission gear selection information to the PCM and is used for memory recall and mirror tilt in reverse functions
• The powertrain control module, if equipped with memory mirrors--Class 2 module that requires programming when replaced and provides Class 2 message indicating transmission gear selection
• The driver information center (DIC), if equipped with memory mirrors--Part of the instrument cluster which is a Class 2 module that requires programming when replaced and is used to personalize the memory recall and mirror tilt in reverse functions
• Fold motor in each of the outside mirrors, if equipped with power fold mirrors--Provides extend and retract movements of the mirror and is serviced as a complete mirror assembly
Each of the outside power mirrors contains 2 reversible motors to provide horizontal and vertical movement of the mirror glass. The vertical motor operates the up and down directions and the horizontal motor operates the left and right directions. If equipped with power folding mirrors, each outside power mirror will contain a reversible fold motor to operate the extend and retract functions. Each of the mirror motors are circuit breaker protected.
DTC B1722
The driver door module (DDM) and passenger door module (PDM) switch the mirror fold motor control circuits to battery voltage and ground in response to mirror extend or retract command.

the fuse for the mirrors is in the fuse block inside the car on the left side of the dash-however the mirrors do not fold in with the switch,you fold them in with your hand-usually for storage(car cover)