Power door lock circuit poor electrical connection.
Power door lock circuit.
Locate the harness plugged directly into the back of the door lock switch.
Check the fuses and circuit breakers especially if none of the power door locks work.
Lift the power switch off the door.
A quick pull on this point and the door is unlocked.
A simple vertical motion from either the knob on the door or the power lock actuator is all that s needed to turn the lock and open the door.
Power door lock harness is open or shorted.
Faulty body control module bcm.
Vehicles have one door unlock system that controls all of the door locks as well as the trunk lock so the b1310 code applies to all of the vehicle s locks.
Activate the power lock switch to its lock and unlock positions while listening for a distinctive click sound.
If there are no external door lock switches you will most likely have a vacuum type system or an aftermarket door lock system with relays or have an added actuator that needs relays.