Stopping the flashing 4WD light with pictures

My thanks to facade for giving me directions.

If you look under the battery, there is a birdsnest of rubber pipes and the two vacuum valves. There is a round switch with two wires on attached to one of the pipes near the valves. Join the wires together.

Then there is a pipe leading from the manifold to this birdsnest. Blank it off at the manifold with a rubber cap.

One look under the battery almost put me off. Oh for tiny hands.


I removed the vac tank for better access. Here is the plug on the switch viewed from the radiator.




The round switch unit pulls out of a spring clip for better access but not much . I wanted to remove the wiring plug from the switch rather than cut the wires and that was a nightmare. Eventually I kinda broke the plug's clip as you can maybe see.



TBC......................

Contd........................
Next I made a patch lead.



Which fits like this.



Then all I had to do was whip off the vac tube going from the round switch to the manifold and replace it with a plugged bit of tube. I was going to use a ball bearing but that's another story. :laugh:




Finally fitted a decent blanking plug.

Just to confirm. If I fit the shorting link and then plug the take off from the manifold then I can run FWHs without the flashing warning and 4wd will be fully functional without any other mods? Sorry if it sounds dumb its been a long day - off to Tong tomorrow and just discovered a broken hub.

Rhinoman wrote: I can run FWHs without the flashing warning and 4wd will be fully functional without any other mods? Sorry if it sounds dumb its been a long day - off to Tong tomorrow and just discovered a broken hub.

If I am understanding correctly; if you are using MANUAL selectable hubs then yes. If you have locked (or unlocked) non manual hubs (permanently) by some method then again I think yes.

Yes I have some Aisin free wheeling hubs that I can use. If I don't do the switch mod will I have 4wd and the only issue will be an annoying flashing light?

If

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If you have manual hubs and transfer box then yes, you will have 4wd no matter what the electronics think

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Electronic transfer box

It looks like mine will be a little easier to do because that switch is already hanging loose! Underneath the vacuum take-off from the manifold there is another pipe that appears be plugged, what is that for?. I'm a little concerned that if I don't blank off the vacuum pipe at the manifold I will have a vacuum leak when 4wd is engaged.

My VSVs and switch were just hanging in free air, another dodgy job by a previous owner:




I didn't have time to sort all that out so I pulled out the switch and VSV module. I blanked off the manifold take-off and then used the T=piece from the
pipes that I removed to connect together the remaining pipework to keep the dirt out:

Rhinoman wrote: My VSVs and switch were just hanging in free air, another dodgy job by a previous owner:

Must compliment you on the nice clear pics James.
I am one of those who leaves some things free hanging, especially if it is awkward to reach or if I am returning to it frequently...........and cos I am too idle to refit stuff. :blush:

So it worked fine in the end??

I just got back from Tong, 4wd worked perfectly and no flashing light.