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Have a 05 Navigator with electrical problems.. It was a taxi, for some weird reason, and so the taxi light is prob the cause of some of the issues. I have a suspension light, advtrac, and also the alternator seemed to fail, not sure if that was due to the electrical issues, but I did replace that to have a vehicle to drive for now.. Also, my windows don't work, nor do the side mirrors, and the locks seem to work intermittently.. One side will lock and the other will unlock.. Please help me if you know about, or been in a similar situation and were able to resolve these issues.. Thank you in advance.. Stankin_Lincoln
Welcome! I just picked up a project 2003 Navigator with a few electrical issues as well.
Post up your issues in the Navigator section for more help.
I can tell you that most of the major systems have modules that sometimes need to be reset to work properly. My driver seat doesn't work, but the passenger does. Only a few of my windows work which is due to a flaky window switch.
Try pulling your window switch and check for power there, and try spraying cleaner in the switches.
Thanks for the replies guys. I'm new and will have to check more often. She is actually not running now with what I think is a gas issue. It cranks but won't start