I have my door lock code for Lincoln Navigator 2005 but i dont know how to open or close doors and also can i use it to close door slide gate at the back

Electronic's , aren't they great ? There is a control module (power lift gate module ) Switch (sensor) inputs to the module . Lift gate obstacle detection strip right and left , liftgate cinching motor ,liftgate unlatch motor .Liftgate drive motor assemblys left and right . Probably a bad switch feeding bad voltage signal to the control module ! Like one of the obstacle detection sensors maybe. Could possibly have DTC'S - diagnostic trouble codes stored in the control module. Your best bet maybe to have the dealer run diagnostic's on it , check for codes . Need a factory or professional type diagnostic tool to do this. I would say you mite be able to check the sensor inputs to the module , don't know what or how much voltage > Some of these circuit's are a five volt signal from the module . Ohm check the obstacle detection sensor ? I still think best thing would have it checked for DTC'S . Almost forgot about the thing opening when you close another door , All the modules on the vehicle are connected on what is call a serial data network . Doors have modules inside as well .could be commanding that door open some how.
If you would like to see what your up against , here is a web site for free wiring diagrams http://www.bbbind.com/free_tsb.html Enter vehicle info. year , make , model and engine size. Under system click on body & accessories , then under subsystem click on power liftgate. Click the search button ,then the blue link. The second diagram down starts liftgate diagrams . Good luck !

Only one bad door switch should do that

The 20 min time out is the GEM or Body Module,
which is normal only because you have a bad switch,
otherwise it goes to sleep when either front door opens

Put radio on & open a door,the radio should go off
& kill the time delay if no issues exist

Try checking the fuse box for the door lock fuse fault and replace with DESIGNATED fuses, the right fuse will be shown on the cover of fuse box.

As lomg as you have the factory code the procedures are as follows: To unluck the drivers side dorr, simple push in the 5 digit code. If you want to unluck the other doors & liftgate, after you push in the 5 digit code and the drivers door unlocks push the 3/4 button within 5 seconds and if you want you can open the liftgate window by pushing the 5/6 button within 5 seconds. If you want to lock all doors and liftgate, after the drivers side door is closed you can push the 7/8 & 9/0 button at the same time and all the doors & liftgate will lock. As far as the sliding door, no the keypad cannot be used for that. the only other function I believe you can do with the keypad is to activate or deactivate the autolock & you can also store a personal 5 digit code as well. This should be in your owners manual if you have one. If you do not and would like a copy, you can email me at [email protected] with your make, model and year and I will be happy to email you a copy. I hope this helps and good luck.

Spray lithum (sp?) grease into the latch that is in the lift door side. Open and close the door a few times. Light should go out.

check the fuel cut off switch in the back on the left close to the back door

Check all door switches first. sounds like loose wiring

Back gate wont open on 02 lincoln navigator what can be wrong

the reason the locks dont work more then likely there is a code stored in the bcm for a lock output circuit normally caused by one if not both of the sliding door acuators. even if you change the acuators the locks still will not work until the code is cleared.