3rd gen 4wd :(

[Ava_Banana]

So....fitted my diff breathers and have managed to lose my 4wd.

When trying to put a front breather on, I was running my hand all round the front diff and transfer case.

It is a 3rd gen (albeit the very early one (or potentially an american style one) that doesn't have "multi-mode" 4wd).

When I press the 4wd button on the transfer lever, nothing happens...no light, no 4wd, no nothing.

I don't know where the relay is (and in the past, when it was working and selected I never heard a relay clicking on).

I have checked the a.d.d hoses and they are all connected top and bottom.

I have had the hoses off the solenoids and I am getting "suction" on some of them.

When I am under the car, no matter where the lever or switches are the front prop-shaft can be spun by hand.

I have disconnected and cleaned every plug on the transfer case I could find and re-connected it.

It drives etc fine in 2wd.........but I wanted a 4wd so I could get it muddy.

Anyone any ideas?

If there is an a.d.d. sensor or switch on the front diff....if there was a problem with this would it give these symptoms?

I am hoping it is something simple.........as it was simple to cock up

[Ava_Banana]

Any thoughts anyone?...something simple?

[MudSurfer]

Check the connections on the front diff - there should be a couple there, smaller one for the 4WD light on the dash, the other (on the back I think) is for the motor to engage the sleeve that connects the diff (simple terms).

Just make sure everything that looks like it should be connected is.

[Ava_Banana]

What I thought.........and what Mudsurfer said (thanks matey)...

..plug on passenger side of front diff that follows the breathers up.....just had a fiddle around with it and got back in the truck and the green light came on.

.....as I had the car up on axle stands I even checked it was working (lifted one front wheel and one back wheel....stuck it in drive then engaged 4wd and the front span as well as the back...

Happy I am

when I get the time, I'll re-wire the plugs and waterproof it all, it all looks a little exposed.