When you are doing an SCR/AdBlue/DEF delete on a 3.2 L Ranger the following things need to be unplugged.
1. The SCR/AdBlue/DEF controller behind the Glovebox at the A pillar.
2. The SCR/AdBlue/DEF central controller plug at the rearaxle (this is also where the SCR/AdBlue/DEF tank is located.