Cargo light stays on after car is off and door ajar light it's on when car is on.check all doors they're all close

SOURCE: Ford taurus door ajar light stays on

Try using some WD40 in the door latches. Open and close the doors several times this should free up the sticking switch

SOURCE: Interior Lights and Door Ajar light stay w/beeping noise.

Try spraying WD-40 into the door latching mechanism (door side). I learned this fix after two battery replacements, but have only had to spray twice in the more than seven years of ownership

SOURCE: door ajar light on

The drivers side door switch goes bad all the time on those, try replacing or check if its sticking.the small little button int the door jam.

SOURCE: 2003 Explorer door ajar light stay on when all doors are closed

I had this problem on my 2003 explorer and took WD40 and gave the lock mechanism a good dose where it meets the clasp on the door jam. Then open and close the doors a couple of times to get them working. They get gummed up and sometimes have a tendency to stick.

SOURCE: door ajar light stays on

go to your local parts store and buy a can of PB BLASTER lubricant then open each door and spray the latch assembley really good then close and open the door 10 to 15 times. do this with each door. the door ajar light switch is located in the door latch assembley and cannot be seen so soak the latch assembleys really good so lube reaches the switch. these switches sometimes get stuck but this usually frees up the switch