Esof not working ,when u switch the dash selector switch nothing happens found that the 2wd vaccum valve [under Hood] never drops out and the 4wd valve never turns on. There isn't any clicking noise indicating that any relays r trying to work also found resistance values at dash switch 3k for 2h, 1k for 4h and 300 for 4l what should the voltage be at switch i have the constant 12v on the coils for the vaccum valves but the gnd is not switching to turn the 2w off and the 4w valve on

When changing the selector to 4wd low or high nothing happens. No clicks, no bang nothing. Yes I’m in neutral. No light comes on the dash neither

4-wd not engaging. And after several test of vacumme components and electrical fuses related to this model al seem to be correct. Then we checked voltage to the selector switch and noticed that the voltage is only 2.5 volts Not 12 volts. Is it correct that there should be 12- volts supplied to the selector control and if so how could we correct this?

I have a Ford F150 XL 4WD 5.4L. What happens is that after stoppin for around 10 minutes the water starts leaking, but there is no high temperature indication until it lost around half the water, and then it indicates it's overheating.
Notes:
* I removed the thermostat two monhts ago
* I removed the water pump but it looks in good shape, it might be leaking but very very little, not enough to run out of water in 10 minutes
* It has 200.000 miles
* I can't see any leak in the water hoses
* The readiator doesn't seem clogged
* The water intake is not leaking
* There is no warning light in the dashboard

I have a Ford F 150 4WD, and the issue is that it doesn't respond while accelerating, and there is a wrench light in the dashboard

When the truck goes on 4H or 4L sometimes a Hard noise and knock comes is like the 4wd system suddenly dissengaged and engaged again. The front axle free wheel system is working ok.

My phone fell off the dash and turned my 4x4 switch slightly between off and 2HI. I pulled over put it in neutral cycled the switch to engage it and then disengage the four wheel drive. Then the check 4x4 light came on and remains lit. The vehicle does still switch in and out of four wheel drive.

Power train malfunction/ reduced power , four wheel drive fault has been detected

Feel likes the trans is slipping, put it in four wheel drive the other day everything was fine drove fine, pulled through the snow fine, sat in drive for two days started it tonight and the wrench lite on the dash is on and the trans feels like it's slipping? Tried to put the button into towing mode but it won't show on dash as normal? Very cold out could it be stuck in 4 wheel?