Activate the power lock switch to its lock and unlock positions while listening for a distinctive click sound.
Power door lock circuit.
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.
Lift the power switch off the door.
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.
A quick pull on this point and the door is unlocked.
Locate the harness plugged directly into the back of the door lock switch.
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.
Faulty body control module bcm.
Check the fuses and circuit breakers especially if none of the power door locks work.
The b1310 code is a generic obd ii trouble code that detects a circuit malfunction with the power door unlock system.
How to troubleshoot electric door locks step 1.