I did some checking. I got a working motor and new cable. The wiring to the motor was correct. I double and tripple checked. I remapped the extruder motor to drive 4, heated up the hot end and manually extruded (without actually extruding just running a motor) and it worked fine. I remaped the same setup to drive 3 (original E0 driver) and the new moto did not work and I got the same warning for a short to ground. So I do have a bad driver for EO on the card. I then Checked the BIQU motor. I have readings directly form the motor. one coil is 2.7ohm and the other is .7ohm. So iI do also have a bad motor. Probably what fried the driver on the Duet. So off to search for anew motor. Looks like the gear on the motor is pressed on and accordingto everything I have found not available. It a NEMA 14 motor but all have a plain shaft. So I will contact Biqu to see if one is available. So I do appreciate the help. It pointed me in the right direction.

@droftarts Still on 3.5.2. About to start some long prints . We will see if it works in a few days. Again I thanks you. John.

@droftarts Thanks for your help I did all you asked and kept having the same issue. I reloaded the firmware and it is now working ok. No messages. It must have been something in the install process that caused it.

@droftarts I forgot to sayt hat the config.g and config-override.g were changed when I had issues with the motor driver last year.

@droftarts I am in the middle of a print for the next 20 hours. Will try all when it is done.

@droftarts Here is my config-override.g. looks like heater 2 is listed.

M307 H2 R2.584 C226.4 D8.23 S.7 V24.3 ;TOOL HEAT updtaed 6/28/2023
M572 D0 S.02 ;pressure advance
M307 H0 R0.890 C200.2 D3.32 S1.00 V24.0 ;bed heat
M106 P0 S.75 H-1 Q500

I just copied and pasted the config.g file. hope this helps.

;General preferences
M575 P1 S1 B57600 ; enable support for PanelDue
G90 ; send absolute coordinates...
M83 ; ...but relative extruder moves
M550 P"OLDIRON PRINTER" ; set printer name

;Network
M552 S1 ; enable network
M586 P0 S1 ; enable HTTP
M586 P1 S0 ; disable FTP
M586 P2 S0 ; disable Telnet

;Drives
M569 P0 S0 ; physical drive 0 goes backwards
M569 P1 S1 ; physical drive 1 goes forwards
M569 P2 S0 ; physical drive 2 goes backwards
M569 P3 S0 ; physical drive 3 goes backwards
;M569 P4 S0 ; physical drive 4 goes backwards TITAN AERO
M569 P4 S1 ; physical drive 4 goes forwards SLICE MOSQUITO
;M569 P3 S0 ; physical drive 3 goes backwards
;M569 P3 S0 ; physical drive 3 goes backwards
;M569 P3 S0 ; physical drive 3 goes backwards
;M569 P3 S0 ; physical drive 3 goes backwards
M584 X0 Y1 Z2 E4:4:4:4 ; set drive mapping
M350 X16 Y16 Z16 E16:16:16:16 I1 ; configure microstepping with interpolation
;M92 X80.70 Y79.95 Z399.74 E408 ;set steps per mm E3D titan aero extruder
M92 X80.70 Y79.95 Z399.74 E405 ; set steps per mm mosquito extruder (recheck)
;M92 X80.70 Y79.95 Z399.74 E454. ; set steps per mm biqu extruder
M566 X800.00 Y800.00 Z800.00 E650:800:800:800 ; set maximum instantaneous speed changes (mm/min)
M203 X7500.00 Y7500.00 Z6500.00 E900:900:900:900 ; set maximum speeds (mm/min)
M201 X800.00 Y800.00 Z500.00 E250:300:300:300 ; set accelerations (mm/s^2)
M906 X1400 Y1800 Z900 E1200:800:800:800 I50 ; set motor currents (mA) and motor idle factor in per cent
M84 S300 ; Set idle timeout

;Axis Limits
M208 X0 Y0 Z0 S1 ; set axis minima
M208 X315 Y310 Z400 S0 ; set axis maxima3

;Endstops
M574 X1 S1 P"!xstop" ; configure active-(high) LOW endstop for low end on X via pin xstop
M574 Y1 S1 P"!ystop" ; configure active-(high) LOW endstop for low end on Y via pin ystop
M574 Z1 S1 P"!zstop" ; configure active-(high) LOW endstop for low end on Z via pin zstop

;Z-Probe
M950 S0 C"duex.pwm1" ; Duet 2 WiFi/Ethernet + DueX2/5
M558 P9 C"^zprobe.in" H3 F50 T9000 R0.5 ; Duet 2 WiFi/Ethernet, DueX2/55
G31 X-5 Y-25 Z3.66 ; z probe offset
M557 X0:300 Y10:300 S30 ; bed mesh size and spacing
M376 H9 ;bed mesh fading

;Heaters
M308 S0 P"bedtemp" Y"thermistor" T100000 B4138 ; configure sensor 0 as thermistor on pin bedtemp
M950 H0 C"bedheat" T0 ; create bed heater output on bedheat and map it to sensor 0
M307 H0 B0 S1.0 ; enable bang-bang mode for the bed heater and set PWM limit
M140 H0 ; map heated bed to heater 0
M143 H0 S120 ; set temperature limit for heater 0 to 120C
M308 S1 P"e0temp" Y"thermistor" T100000 B4138 ; configure sensor 1 as thermistor on pin e0temp
M950 H2 C"e0heat" T1 ; create nozzle heater output on e0heat and map it to sensor 1
M307 H2 R2.584 C226.4 D8.23 S.5 V24.3 ;tool heat
M143 H2 S350 ; set temperature limit for heater 1 to 350C

;Fans
M950 F0 C"fan0" ; create fan 0 on pin fan0 and set its frequency
M106 P0 S.75 H-1 Q500 ; set fan 0 value. Thermostatic control is turned off
M950 F1 C"fan1" Q500 ; create fan 1 on pin fan1 and set its frequency
M106 P1 S.75 H-1 Q500 ; set fan 1 value. Thermostatic control is turned on

;Tools
M563 P1 D1 H2 F0 ; define tool 1
M572 D1 S0.02 ;ADDED PRESSURE ADVANCE SETTING
G10 P1 R0 S0

; Miscellaneous
M501 ; load saved parameters from non-volatile memory
M911 S10 R11 P"M913 X0 Y0 G91 M83 G1 Z3 E-5 F1000" ; set voltage thresholds and actions to run on power loss
T1 ; select first tool

I recently upgraded my firmware to 3.5.2 and after doing so I started to get a warning message "Error in start-up file macro line 2: Heater 1 not found" a start up. In the past I had issues with an extruder driver that was burned out by a faulty motor. I had to switch to extruder 1 and also heater 2 and was working for an extended period of time. Till the firmware upgrade. Not sure where to look for the start up file macro (unable to find). I am sure if I am pointed in the right direction I will fix it. Also tried uploading the config.g file but it is not working. Probably not doing it right. Printer is working ok but the message is annoying. Please help.

@droftarts I will add the G90 and change the pressure advance setting to the correct tool. The reason I am not using the 0 drive is that ithe driver was fried by my bad extruder motor. I had to switch drives once I got the motor replaced. Thanks for all the help

@droftarts I finally got it working. I had a bad factor BL touch harness to begin with (I have a replacement coming). Before I found out that I messed with everything and got everything out of wack. I should have followed instructions and approached things logically. I now have a bed level height file, homing works great including the Z axis and my first and second prints came out great. I still have to mess with pressure advance (I just installed a new extruder) and dial in the Z height. Thanks to all that helped I really appreciate that. As for the final files here they are.

;General preferences
M575 P1 S1 B57600                                               ; enable support for PanelDue
G90                                                             ; send absolute coordinates...
M83                                                             ; ...but relative extruder moves
M550 P"OLDIRON PRINTER"                                         ; set printer name

;Network
M552 S1                                                         ; enable network
M586 P0 S1                                                      ; enable HTTP
M586 P1 S0                                                      ; disable FTP
M586 P2 S0                                                      ; disable Telnet

;Drives
M569 P0 S0                                                       ; physical drive 0 goes backwards
M569 P1 S1                                                       ; physical drive 1 goes forwards
M569 P2 S0                                                       ; physical drive 2 goes backwards
M569 P3 S0                                                       ; physical drive 3 goes backwards
M569 P4 S1													     ; physical drive 4 goes forwards
;M569 P3 S0                                                      ; physical drive 3 goes backwards
;M569 P3 S0                                                      ; physical drive 3 goes backwards
;M569 P3 S0                                                      ; physical drive 3 goes backwards
;M569 P3 S0                                                      ; physical drive 3 goes backwards
M584 X0 Y1 Z2 E4:4:4:4                                           ; set drive mapping    
M350 X16 Y16 Z16 E8:8:8:8 I1                                     ; configure microstepping with interpolation
M92 X79.68 Y79.44 Z400.00 E820.0:454.00:454.00:454.00             ; set steps per mm
M566 X900.00 Y900.00 Z900.00 E1600.00:1600.00:1600.00:1600.00    ; set maximum instantaneous speed changes (mm/min)
M203 X4000.00 Y4000.00 Z1500.00 E4000.00:4000.00:4000.00:4000.00 ;set maximum speeds (mm/min) 
M201 X1000.00 Y1000.00 Z350.00 E600.00:600.00:600.00:600.00      ; set accelerations (mm/s^2) 
M906 X1000 Y1000 Z1000 E800:800:800:800 I50                      ; set motor currents (mA) and motor idle factor in per cent 
M84 S300                                                         ; Set idle timeout



;Axis Limits
M208 X5 Y5 Z0 S1                                                ; set axis minima
M208 X320 Y300 Z400 S0                                          ; set axis maxima

;Endstops
M574 X1 S1 P"!xstop"                                             ; configure active-(high) LOW endstop for low end on X via pin xstop
M574 Y1 S1 P"!ystop"                                             ; configure active-(high) LOW endstop for low end on Y via pin ystop
M574 Z1 S1 P"!zstop"                                             ; configure active-(high) LOW endstop for low end on Z via pin zstop

;Z-Probe
M950 S0 C"duex.pwm1"                                            ; Duet 2 WiFi/Ethernet + DueX2/5
M558 P9 C"^zprobe.in" H3 F100 T9000 R0.5						; Duet 2 WiFi/Ethernet, DueX2/5
G31 X0 Y-40 Z.6 P25												;probe offsets, trigger height and trigger value
M557 X1:320 Y1:250 S30                                        ;define mesh grid

;Heaters
M308 S0 P"bedtemp" Y"thermistor" T100000 B4138                  ; configure sensor 0 as thermistor on pin bedtemp
M950 H0 C"bedheat" T0                                           ; create bed heater output on bedheat and map it to sensor 0
M307 H0 B0 S1.00                                                ; enable bang-bang mode for the bed heater and set PWM limit
M140 H0                                                         ; map heated bed to heater 0
M143 H0 S120                                                    ; set temperature limit for heater 0 to 120C
M308 S1 P"e0temp" Y"thermistor" T100000 B4138                   ; configure sensor 1 as thermistor on pin e0temp
M950 H2 C"e0heat" T1                                            ; create nozzle heater output on e0heat and map it to sensor 1      
M307 H2 R2.584 C226.4 D8.23 S.5 V24.3							;tool heat 
M143 H2 S350                                                    ; set temperature limit for heater 1 to 350C    

;Fans
M950 F0 C"fan0"                                                 ; create fan 0 on pin fan0 and set its frequency
M106 P0 S.75 H-1 Q500                                           ; set fan 0 value. Thermostatic control is turned off
M950 F1 C"fan1" Q500                                            ; create fan 1 on pin fan1 and set its frequency
M106 P1 S.75 H-1 Q500                                           ; set fan 1 value. Thermostatic control is turned on



;Tools
M563 P1 D1 H2 F0                           			 			; define tool 1  
M572 D0 S0.004									                ;ADDED PRESSURE ADVANCE SETTING	
G10 P1 R0 S0

; Miscellaneous
M501                                                            ; load saved parameters from non-volatile memory
M911 S10 R11 P"M913 X0 Y0 G91 M83 G1 Z3 E-5 F1000"              ; set voltage thresholds and actions to run on power loss
T1                                                              ; select first tool

; deployprobe.g
M280 P0 S10 				;code for deploying the Z probe

; retractprobe.g
M280 P0 S90     			;code for retracting the Z probe

; homeall.g
; called to home all axes
;
; generated by RepRapFirmware Configuration Tool v3.3.3 on Wed Sep 29 2021 16:53:30 GMT-0500 (Central Daylight Time)
G91                     ; relative positioning
G1 H2 Z5 F6000          ; lift Z relative to current position
G1 H1 X-302 Y-302 F6000 ; move quickly to X and Y axis endstops and stop there (first pass)
G1 H2 X5 Y5 F6000       ; go back a few mm
G1 H1 X-302 Y-302 F180  ; move slowly to X and Y axis endstops once more (second pass)
G1 X150 Y150 F5000
G30 
; Uncomment the following lines to lift Z after probing
;G91                    ; relative positioning
;G1 Z5 F100             ; lift Z relative to current position
;G90                    ; absolute positioning

; homez.g
; called to home the Z axis
M98 P"homeall.g"                             ; Call the home X & Y macro to home those axes first
M98 P"deployprobe.g"                         ; Called to extend the BL-Touch probe pin to allow probing to take place
G30                                          ; Home the Z axis by probing the bed
M98 P"retractprobe.g"

@oliof I was using those names beacause that is what I was sent by a friend of mine. It has changes since. I will post the final files once it is done, working and tested. I am in the process of doing that now but unfortunatly life just gets in the way.