Question about 2001 Ford Expedition

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01 ford expedition diagnostic plug in

Hello, i have been having a problem with my truck diagnostic plug in under the dash. I was told it doesnt work and they cant read the computer. I took it to a auto shop and they checked all the fuse's and said that they are all good. they refered me to ford, which costs a fortune. any ideas on why else the diagnostic plug could not work?

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The data link gets it's power from the fuse that also powers the cig. lighter,is the cig. lighter working?
If not check fuse no.3 (20amp) in the interior fuse panel.

We have seen on some occasions that some scan tools just will not link up for some reason. We have had several vehicles that customer went to have their state inspections done and the tester at that shop would not link up.We hook our ford diagnostic tester to it and it links right up,we then hook them to our inspection machine(which is not ford equipment) and they link right up to it.

Posted on Feb 27, 2009

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