I am measuring the pins 1 and 2 on the controller expansion, I am using two jumper cables connected to my multimeter.

I have been trying to fix my BLtouch and now i have the problem down to the Duet wifi not supplying 5v to the expansion slots, I have the 5v from the power supply jumper connected. I connected a multimeter and it is not showing anything. I have been having this problem for months now, is it possible to break the duet in some way where it doesn't supply the 5v? how can I fix this? Thanks for the help.

@fcwilt I do not have the duex connected to my controller

@phaedrux I just tried the shorter cable thing, It still does not turn on or self test.

@paulhew No lights at all

Photo: https://ibb.co/h9TZMvF

I have had the duet wifi running with the BlTouch for about 3 months now, I recently redid the wiring (for a cable chain) and the probe no longer is working. I bought a genuine Bltouch from their official website. I turn on my Duet wifi and the LED does not light up or self test. I have tested all the wiring with a multi meter, and they all seem to be working. I am running the Bltouch at 5v off the duet 2 wifi. What am I missing? (There is an extention for the wires, From bltouch to duet Brown=Blue, Red=Red, Orange=green)

; Configuration file for Duet WiFi (firmware version 1.21)
; executed by the firmware on start-up
;
; generated by RepRapFirmware Configuration Tool v2 on Wed Jul 03 2019 20:24:43 GMT-0500 (Central Daylight Time)

; General preferences
G90 ; Send absolute coordinates...
M83 ; ...but relative extruder moves

; Network
M550 P"BenchBot" ; Set machine name
M552 S1 ; Enable network
M587 S"ATT-HOMEBASE-4847" P"23192130" ; Configure access point. You can delete this line once connected
M586 P0 S1 ; Enable HTTP
M586 P1 S0 ; Disable FTP
M586 P2 S0 ; Disable Telnet

; Drives
M569 P0 S0 ; Physical drive 0 goes forwards
M569 P1 S1 ; Physical drive 1 goes forwards
M569 P2 S1 ; Physical drive 2 goes forwards
M569 P3 S1 ; Physical drive 3 goes forwards
M350 X16 Y16 Z16 E16 I1 ; Configure microstepping with interpolation
M92 X80.00 Y80.00 Z400.00 E96.2 ; Set steps per mm
M566 X900.00 Y900.00 Z12.00 E120.00 ; Set maximum instantaneous speed changes (mm/min)
M203 X6000.00 Y6000.00 Z180.00 E1200.00 ; Set maximum speeds (mm/min)
M201 X150.00 Y300.00 Z20.00 E250.00 ; Set accelerations (mm/s^2)
M906 X1500.00 Y800.00 Z800.00 E800.00 I30 ; Set motor currents (mA) and motor idle factor in per cent
M84 S30 ; Set idle timeout
M584 X0:4 ; Configure dual X with X and E1

; Axis Limits
M208 X0 Y0 Z0 S1 ; Set axis minima
M208 X720 Y330 Z400 S0 ; Set axis maxima

; Endstops
M574 X1 Y1 S1 ; Set active high endstops

;Z probe
M307 H3 A-1 C-1 D-1
M558 P9 H5 F100 T2000
G31 X0 Y0 Z0 P25

; Heaters
M140 H-1 ; Disable heated bed
M305 P1 T100000 B4138 R4700 ; Set thermistor + ADC parameters for heater 1
M143 H1 S260 ; Set temperature limit for heater 1 to 260C

; Fans
M106 P0 S0 I0 F500 H T45 ; Set fan 0 value, PWM signal inversion and frequency. Thermostatic control is turned on
M106 P1 S1 I0 F500 H1 T45 ; Set fan 1 value, PWM signal inversion and frequency. Thermostatic control is turned on

; Tools
M563 P0 D0 H1 ; Define tool 0
G10 P0 X0 Y0 Z0 ; Set tool 0 axis offsets
G10 P0 R0 S0 ; Set initial tool 0 active and standby temperatures to 0C

; Automatic power saving
M911 S10 R11 P"M913 X0 Y0 G91 M83 G1 Z3 E-5 F1000" ; Set voltage thresholds and actions to run on power loss

; Custom settings are not configured