Tractor Repair: John Deere 6410, hazard switch, diagnostic mode

Question
QUESTION: 6410 tractor reverser lever not working,code D1A on screen,cant get screen to clear.Checked fuses and connections,lever under wiper doesn't change screen

ANSWER: Take the fuse out of #115 that will take you out of diagnostic mode. When you put it in reverse and it doesn't move then see what code comes up on the dash and follow up with me.

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QUESTION: Taking out the fuse worked on the screen,I held the lever in reverse but a code didn't come up on the screen The reverser lever will not stay in place it returns back to the center Thanks

Answer
You might have a bad switch if no error codes are active but first I would put that fuse back in an use the turn signal and go to address 00 for all the different controllers like ccu bcu hcu and write down the error codes. When it gets to the end of cycling through the codes hit the hazard switch this will erase them. Take the fuse back out and check for any codes returning. Then we will go from there. If you have a reverser tractor it is common for the switch to go out. The part number for that switch is a AL165301