KZJ78 - Mod to allow Factory Rear Diff to engage in all modes - Help needed

[onotoman]

Hi team,

I'm trying to change the wiring to the 4WD Controller to allow the factory rear diff lock on my KZJ78 to be activated in all modes. The system is designed to only allow engagement in 4WD Low.

I found some info that stated - 'cut the Blue/Red wire to pin #8 (4WD Pin) on the controller and ground it'. I tried this and the diff lock engages in all modes (2WD High, 4WD High and 4WD Low) BUT it will not Disengage :-(

Would anyone have a wiring diagram for the KZJ71/78 or know how I can find which wire to modify?

This is the wire I cut and grounded:

Any help appreciated.

Thanks

Dave