john deere 4105

[Texwing]

I just took a band saw and carefully cut the blinker box open on my jd4500 since the handle had seized and would not move. A little lube and motivation its working like new, and there is a little motor in the thing that makes the blinker blink. More than 3 wires because its also lighting up some other lights in the turn signals. I used hot glue to seal it all back up and its working fine.
Its a big clunky thing inside and not hard to mess with, if yours is like mine. Getting it open did rewire cutting thru the case at the base on all four sides, they went out of their way to make it not user serviceable.

 

[arlen4720]

On my 4320 the turn signal switch along with the display mode switch is how you access the onboard diagnostics. This seemingly minor problem maybe more than that. Also I purchased the maintenance CD versus a physical manual. The CD was only $75. It is a searchable PDF file/ ctl f. I am not sure what the manual will cost. Just an FYI. Later.

The 4x20's blinkers are actually completely controlled by the computer. They don't even have a flasher module!

 

[acuser]

Update..... I received my service manual today and indeed the flashers and turn signals are controlled through the display cluster(LVA14253) a $438.00 part.

I havent taken it apart again yet but the signals and the hazards have different inputs so its likely the cluster, otherwise I think signals or the hazards one would be working.

Looks like the signals can work and the hazards not and vice versa.

Anyway hopefully this will save someone in the future a lot of time.

Thanks everyone for your help.