2002 4x4 question

[RikRdkillr]

I have a 2002 explorer and the 4x4 high and low lights flash 3 times simultaiousley pauses for about 3-5 min then repeats. 4x4 does not work. Alot of postings talk of the 4x4 Mod being a big problem? Has anyone had this exact light flashing and had the Mod replaced? and did it fix the problem?

 

[fixxxer]

Start by having any trouble codes read before you start throwing parts at the problem.