Ford: 1997 Ford F150, slow drain, battery shop

Question
3 wks ago I replaced the dead battery.  I don't run the truck much, yesterday I went to start it and , again, the new battery was dead.  I Had the battery shop replace it only to find that there is a slow drain on the battery.  They eliminated the fuses under the hood and found position #22 to be the culprit.  I pulled the fuse while the truck is parked but need it back in when it is running.  What do I need to do to correct this problem?

Answer
sounds like you may have a relay sticking make sure you have everything off and the key off. then remove the neg. side of the battery cable and touch it on and off the battery an lessen to see if you here a relay clicking this may be your problem .meanwhile let me see what circuit 22 is