R34 gtt traction control

[Jfitz]

When i start the car no lights come up on the dash for slip or traction etc and pressing the button does notting traction is on all the time. Would be good to be able to turn it off when needed

[NEO25T]

I wonder if you could just unplug it at the throttle body

[GTSBoy]

Fault codes are the result.

Tried seeing if the button even works?  It's a momentary switch.  So just pull it out and briefly short the wires with a bridge.  See what happens.  Failing that, try it at the TCU on the appropriate pins.