2007 ford focus rear door lock

Doesn't have any relay's for the door locks . The (GEM) generic electronic module controls the door locks . Your best bet , take it to a qualified repair shop.

The Door Lock Function When a door lock control switch is moved into the lock position or a door lock cylinder is rotated to the lock position, a ground is provided to the lock circuit input to the generic electronic module (GEM). The GEM then provides 12 volts to one side of the door lock actuators contained in the door latch assembly and simultaneously grounds the other side of the door lock actuators. This completes the door lock actuator circuit, causing the door lock actuators to rotate a cam assembly, which then locks the doors.
The Door Unlock Function When a door lock control switch is moved into the unlock position, the door lock switch grounds the unlock circuit input to the GEM. The GEM then provides 12 volts to the opposite side (relative to locking the door) of the door lock actuator(s) contained in the door latch assembly and simultaneously grounds the other side of the door lock actuator(s). This completes the door lock actuator circuit, causing the door lock actuator(s) to rotate a cam assembly in the opposite direction, which then unlocks the door(s).

Generic Electronic Module (GEM) Diagnostic Trouble Code (DTC) Index DTC Description Source Action B1300 Power Door Lock Circuit Failure GEM Go To Pinpoint Test D . B1309 Power Door Lock Circuit Short to Ground GEM Go To Pinpoint Test D . B1310 Power Door Unlock Circuit Failure GEM Go To Pinpoint Test D . B1341 Power Door Unlock Circuit Short to Ground GEM Go To Pinpoint Test D .
Have a qualified technican diagnose the problem .

This sounds like a bad lock actuator, this is the part that locks the door with the power locks button or the remote. you will need to remove the rear door panel and dissconnect the actuator, this way you will be able to lock it with the key but the power lock will not work on the door,

I vote for corroded or loose cable inside door.

change the drivers side door lock mechanism ,its a complete unit full of fancy electronics

Probably rusted and needs to be freed up.

yes it sounds like the turn signal switch is defective, the brake lights go through that switch as well.

you need to remove the door panel and inspect the lock/latch mechanism, maybe a rod problem

i have a 1992 honda accord 4 door & the dash door display flashes red but the doors are close?

Get in passenger side and unlock drivers side manually, this will unlock the 4 doors.