Help ! What is this....

[Cdup]

(2000 f250)it's some sort of vacuum switch above the passenger side fender wall..... the vacuum lines are taped off and the electrical plug is undone. What is it for and with it unhook what kind of symptoms would i see happening to the truck?

[jesilvas]

Is it a four wheel drive?

My Samsung SGH-I997 made me send this.

[zrain25]

That you esof solenoid. I took mine out after I pulled the lines to my hubs. It's for the electronic shift on a fly


Sent from my Autoguide iPhone app

[Cdup]

Yes the truck is a 4x4 and now i know why i have to lock my hubs in order for the 4x4 to work...... how many vacuum connections is required on it in order for it to work....3?

[ToddOH43]

Originally Posted by Cdup

Yes the truck is a 4x4 and now i know why i have to lock my hubs in order for the 4x4 to work...... how many vacuum connections is required on it in order for it to work....3?

If you have aftermarket hubs it wont work. OEM "manual" hubs have a vacuum lock/unlock set up.

[Cdup]

I have the factory hubs !

[ToddOH43]

Originally Posted by Cdup

I have the factory hubs !

When mine had the factory hubs it was anyone's guess whether they would lock or unlock on their own. I finally replaced them and capped off the vacuum lines.

[Cdup]

I only had to use my 4x4 once since I had it.... But the hubs locked and unlock without any problems.

[Zaairman]

Just cause the hubs turn to the unlocked position, doesn't mean they're unlocked...

[Cdup]

I'll take another look at them...... but i experiment with doing the unlock and lock of the hubs by climbing the levee where i live to make sure it was in four wheel drive or not. What would be the best way to begin checking the vacuum switch..... hook up the hoses then plug in the switch and see what i got. I would think it would only be 3 hoses that attach to the switch.... correct me if i'm wrong. Thanks for all of the input on this. I really appreciate it!