Screen issue when cab tilts

[w3akerthens]

I just got a 2007 John Deere 643K feller buncher and it has the Parker IQAN system. Works fine, but the screen blinks and resets when I tilt the cab. No big problems, just annoying during work. The last owner said it could be a loose wire or sensor near the cab hinge. I don't have a manual, so not sure where to check.

Has anyone had this happen? Would love a manual too if someone has one. Thanks a bunch!

 

[Marco_Gambler]

Don't waste time tearing into the whole system. Tilt the cab slowly while watching the screen, then wiggle the harness by hand. If it blinks, you found the trouble spot. Usually it's just a loose connector you can clean and zip-tie tighter.

 

[PaleSaints22]

Yeah, that screen issue sounds like it could be a wiring pinch near the hinge, maybe a worn connector or loose ground.

 

[lgf3rr]

I just got a 2007 John Deere 643K feller buncher and it has the Parker IQAN system. Works fine, but the screen blinks and resets when I tilt the cab. No big problems, just annoying during work. The last owner said it could be a loose wire or sensor near the cab hinge. I don't have a manual, so not sure where to check.

Has anyone had this happen? Would love a manual too if someone has one. Thanks a bunch!

I'd also suspect it's a connection issue, likely in the cab harness near the pivot point. Look closely at the harness running along the cab hinge on both the chassis and cab side. You're hunting for any section that is chafed, rubbed thin, or pulled too tightly. It's usually the ground wire or the main power supply line. Inspecting and re-seating the main harness connectors there might help temporarily, but a rub-through needs to be taped and protected. Then for the manual, try checking on eBay or with a local Deere dealer!