I have a 1998 ford f-150 4x4 truck ordered a transfer case motor that supposedly will work.It does look like my old one but mine has an extra wire comming from the connector going to the case itself (Mine has a rectangler 8 pin plug,the one they gave me has 7) installed it and it will not work.Called a Ford garage and they told me i have to push the other wire through.Am i sure i want to try this ?