Hello, I was wondering if anyone can help with my problem. I have a 01 Ford Expedition and the interior lights wont come on when the door is open. Also the diagnostic plug under the dash doesn't work. But if you click the switch for the interior lights manually they work. HELP!!!!
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Re: interior light and diagnostic plug doesn't work
The data link gets it's power from fuse no. 3(20 amp) in the interior fuse panel,which also is the power for cig. lighter. This fuse gets it's power from fuse no. 103 in the battery junction box (50 amp).
For the interior lights the door adjar switches in the door send a signal to the GEM module.It then grounds the coil side of the interior lamp relay. The switch on the dash that you turn on manually also grounds the coil side of the interior lamp relay so that would mean that everyrhing after the GEM is ok.Are the lights not turning on from any door including the deck lid? If not then problem would have to be in the GEM module.
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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.