p38 obd port no power

Hi all i have a 2.5 dshe 2001 and im getting no conection to autologic via the obd port thought it may be the fues so i replaced it but still the same i checked the power and the ground and all seams fine iv got 12v on the positive and a good ohms reading on the negative looking at the pins they are a little corroded so i have replaced the socket hoping this would fix it but still the same

New update all my other wires have a high resistance when i do a ohms test on them higher then the earth wores and did not get including the becm cables

I had an issue with power to mine. Plug behind driver's kick panel (where the door hinges are) was corroded to bits. Cut the plug out and soldered all the wires together. Sorted me out.