all 3 passenger door locks don't work

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all 3 of my pass. door locks don.t work. all 4 doors lock no problem. they just won.t unlock. i'm trying to find a diagram but can't find one does anybody have one or any suggestions. i've tryed grease on the rods and the actuators, didn't help. they started doing it intermitantly. i don't think all 3 actuators (latches) are bad i'm leaning more to a broken wire, a grounded wire or if there is a seperate relay. i know they have logic circuits, that is why i don't want to just start probing.

[99GPGTP]

more information on the type and year model of car would help.

[z3r0]

you have a dead switch on one of the doors
happened on my gtp but i have a coupe and it was the window switches

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Its an 05 grand prie se model the door locks are are set for auto to unlock when placed in park the delay is all so on

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I only have the master switch. And 1 other door lock switch on the passengers front none on the rear just window switches on all 4 doors