2004 Lincoln Navigator, Strange ticking noise coming from rear passenger 3 row area over wheel well some sort of computer box. only when turn ignition or vehicle running, sounds like clock ticking

It could be a relay fuse sticking as well....
I have a 2008 lincoln navigator and had the same ticking noise coming from under passenger side dash and it was my fan blower that was causing the noise once I replaced it ....it stopped

Check at the foot of driver side. On newer models check passenger side. You should find a rectangular panel in the right corner. Remove it to find the fuse box.

There should also be an additional fuse panel located on the drivers side under the hood, in the engine compartment.

See also : How to Replace the Fuses in a Lincoln Navigator | eHow.com

Is the DVD slot in the dash board or in the second row? Does it appear to be factory installed or possibly aftermarket? If factory and in the front, I'd suspect it's for loading navigation system updates. Does your Navigator have factory navigation?

-Rod

Power 3RD Row Seat Problems and Tranny Shutter - Ford Truck ...

www.ford-trucks.com > ... > Expedition & Navigator

Mar 27, 2014 - Expedition & Navigator 1997 - 2002 and 2003 - 2006 Ford Expedition andLincoln Navigator SPONSORED BY: ... First the 3RD row seats won't fold down, noclicking, no sounds, nothing. I the fuses are good and there is power at the fuse box, but no power at the motors or switches. Based on continuity ...

3rd row powerfold seat stuck down - Ford Truck Enthusiasts Forums

www.ford-trucks.com > ... > 2007 - 2014 Expedition & Navigator

Mar 14, 2010 - 3rd row powerfold seat stuck down 2007 - 2014 Expedition ... 2010, 2011, 2012, 2013 and 2014 Ford Expedition and Lincoln Navigator ... I also tried lifting the seat while my wife was pushing the button to raise it, to no effect. There is defnitelypower going to the motor but it just isn't ... Join Date: Feb 2005.

No power to third row seat on 2005 lincoln navigator - Fixya

www.fixya.com/cars/t12295627-no_power_third_row_seat_2005_lincoln

Apr 4, 2012 - no power to third row seat on 2005 lincoln navigator third row seat is ... U will have to replace the entire power seat transmission, there is no ...

Lincoln Navigator Review - Edmunds.com

Its the relay in the fuse box by the passenger side floor board. Remove the kick plate and its either white relay on the top (one is mounted horizontal on the right or rear position and vertical on the front or left. Its $6 bucks at Auto zone. You can switch both of them around and the truck will start and run till you get the replacement. Steve

I assume your talking 3rd row seating A/C, Have the same car and had same problem. Unless you use 3rd row much, unplug it ( under passenger side wheel hump pocket ) this will stop the clicking and has no effect on A/C cooling front & middle row in Florida heat. There are actually 2 plugs, do both. Not the best, but the easiest & cheapest.
Ken

you have a bad blend door actuator the clicking sound you hear is the plastic gears inside it slipping the panels covering rear unit can be removed once removed cut a/c on once clicking starts you should be able to tell which one it is they are about the size of a cell phone usually twoo or three screws holding on to air box and one small electrical connector remove and call ford dealership with part# listed on the actuator and purchase new one these are not available aftermarket that i know of

Hopefully just needs to be reset, those air susp r expensive. Some susp come with a switch to turn on and off could be on the left or right rear back look for it turn off then on if that does not work, disconnect p bat terminal for 5 min then reconnect. Listen for suspension should make some noise.

there is no separate pump for the rear a/c. front & rear operate from the same a/c compressor in the engine cmpartment.
There may be a blower motor back there.

You have the 5.4 3 valve engine in your Navigator, Ford has had various problems with noise from this motor. The cost of repair will vary because this noise cam come from different places, such as cam phasers, valve lash adjusters and sometimes the ticking noise is actually coming from the injectors which is considered normal. I would have it checked out by the dealer. -Jared