Electrical problems

When I use the fob to lock the door it locks and then immediately unlocks every time. What is happening? 2006 Toyoda Tacoma pickup.

 

Any chance you have another key fob in the truck?

 

You don't by chance, have a key in the ignition, do you?

 

It will do this If you have a key in the ignition, the ignition switch is worn out and it signals that you have a key in the ignition and if one of the door locked feedback switches is not signaling that the door lock is locked.

Here is the locked feedback switch in the door lock actuator assembly: