there's a relay under the bumper on assenger side, it is screwed into metal with 5 mm hex head screws. i believe it has a 4 wire plug , may be a 3 wire. it is sort of rectangular with scrw on either side. it should have aluminum ribs like an amp for a stereo does
Not using premium fuel caused that in my 2004 Navigator.
It could be one of your vaccum lines that collapsed
lincoln navigator
Turn signal flasher module?
hellow just wonderin if you guys know where would be the heater core on my 2003 Lincoln navigator
brake switch located on the top of the brake pedal
That would depend on the year of your Navigator and Expedition. See the related link.
You should be able to hear the compressor Overtime the compressor will get noticeably louder. This doesn't necessarily mean that it's failing or should you be alarmed. If you are concerned I would suggest that you take it in and get it checked out.
I would say NO ( I was looking at the 2001 Lincoln Navigator Owner Guide and it does not show anything about it having a cabin air filter )
on my 2000 town car it was the idle air control valve sounds like you have the same problem
The most likely cause would be that the solenoind in the compressor is not venting properly. A little bit of extra information is that Lincoln had a high failure rate with the F5AZ 5A919 A (control module) for that vehicle. But, most likely the compressor is not venting properly.
It could be spark plugs or coil packs. Auto Zone will check your computer codes for FREE. This way you won't be guessing.