Got a new to me truck, 95 f150, xt cab sb, 127k miles, 5.8. Very clean and has lived in a garage it's whole life..
The Problem-
The truck has a constant 4x4 light on as well as the indicator light next to the 4wd switch. It is not in 4wd (I know it isn't, there is ice all over the roads). I had a ford tech diag it and said it was the 4wd control module, located in passenger kick panel. He tested the 4wd engaging motor on the transfer case and It was getting power. Supposidly the switch was good and that left it to be the 4wd module. I replaced it from a scrap yard, but to no avail. It still does the same, not engaging and constant light on.
My question, Of the 3 main electrical components that work to engage/dis 4wd, which one of those is likely to go out?
If it probably isn't on of those, what could it be?
(It has auto hubs as well)

I'm proving to myself the appreciation I have of my 88' f150, which is all mechanical. Turn hubs in, pull lever..and 4wd. I was planning on selling the 88, but am thinking of keeping it due to its sheer reliability and simplicity.

What do I need to do to fix the prob on the 95'?

 

Big issue... The electrical motors used for the 4x4 engagement going bad. Getting power to it is not the same as the motor working... So I would find out if the motor itself is functional.

Locking hubs do not last forever either. There are seals and springs and they are exposed to the weather... (I am assuming the automatic hubs on this model is on the outside like the mechanical ones are, not internal like the late 90's early 00's)

I want to reply to your 4x4 not working with ice all over the roads comment..... I just dont know how to without sound like an ***..

 

Not sure what you meant with the last comment.. I too can say the same back... and will sound like a smart-azz- A truck that was in 4x4 would spin at least one of the front tires.. So....

 

Of all the part on the electric shift 4wd system the two that cause the most issue are the shift motor on the t-case and the hubs.. particularly if they're auto hubs. What I'd suggest is to first verify that the hubs work, do this by jacking up the front end and rotating the front drive shaft, that should immediately engage both hubs. Then remove the shift motor from the t-case and try to manually shift the case, it's very likely this will work because a t-case rarely fails, you can then also verify if the shift motor works with no load on it, and if it doesn't that's likely your problem.

 

Thanks for the imput! I will give that a shot and try it out.