2WD-L on a late -2005 VVT

Number 4 in the drawning is a vacum switch whit white wiring.
Photo from my car. 

 

The Electric.

     

You need to cut one of the wires and add a switch in. When you go into 4wd the transfer case closes the 4wd switch, sending a 12v signal to the controller for the front hubs. The new switch allows you to open the circuit and stop the signal, so the hubs don't engage. I've completely bypassed the transfer case part on mine (pre-vvt) so I can switch the hubs on and off as I please. It's like having manual hubs, but cheaper and easier.

Thanks Busta.   


If i I understand right its means I can take loose the white connection plug whit white wires from the NR4 valve for a tray before i cut anything, it would do the same thing to block the signal.

Do you now know the 4WD / 4L lights on the panel react after this switch mod on a VVT ?

 

I did a test today.

Test 1:

1. I disconect the white plug with wite wires from the vacum valve "nr4"
2. I start the car.
3. I pusch "4WD" button.
4. The green light for "4WD" start flasching om the panel.
5. I coult not go back to 2WD or 4WD-L.

Test 2:
1. I start the car.
2. I disconect the white plug with wite wires from the vacum valve "nr4"
3. I pusch "4WD" button.
4. The green light for "4WD" start flasching om the panel.
5. I could not go back to 2WD or 4WD-L.

It dident work, it sounds like the vacumhubs go in to "4WD" anyway and the 4WD control locks upp.

Open the circuit to stop the signal dont seams to work on my car.


 

Maybe this is the right way to conect the switch between the two white cables as Yakuza suggest earlier in this tread ?

   

Its easy to make a test whit a short cable, but im a little worried to risk break somthing in the 4WD computer.  
 

Sketch in post above is according to my understanding of the original wiki.
I would not Think it would break anything, there is to my knowledge no 4x4 "computer".