Weird door lock problem

[Cummins_steve]

hi guys i have a 2004.5 ram 2500 turbo diesel and i started having a weird problem where my front driver door will lock with the switch and remote but not the others and if i use the passenger switch to lock it still only locks driver side front door

Any ideas on what this probleme can be?

 

[Bloody_Knuckles]

Two door? I would guess a bad lock actuator motor