Power Door Locks Lock Then Unlock

Door lock systems operate the actuator by toggling positive negative voltage to the actuator.

Power door locks lock then unlock.

Then use your test light or digital meter to check for power and ground at the connector when you operate the lock unlock switch. By a signal from a control center in some cars that have power door locks the lock unlock switch actually sends power to the actuators that unlock the door. The body controller is a computer in your car. Maneuver the hook to the console that houses the controls for the power windows and locks.

It s like it thinks one of the doors is open maybe. Unplug the door lock actuator electrical connector. Using either my alarm remote or the central locking button both of the door locks on my 88 will lock but then they immediately unlock. Use the hook to press down on either the unlock button or the window s down button whichever is within reach.

Oh some cars that have electric locking systems have a sensor in the driver side door lock so when you push the lock down on the driver door it makes all the doors lock so if this sensor is malfunctioning it can cause the doors to lock and unlock unexpectedly i ve had this happen before what you can do and this can be done at home though it is easier to have a dealer do it i d do it myself what you can do is take the door apart and either remover the sensor from the lock. Because both door lock switches have the same problem and work in unlock mode it is also unlikely to be a switch problem. However if no buttons are pressed for 30 60 seconds all locks work again for the first couple unlocks locks. Power door locks lock then unlock.

Since the doors unlock that tells you that the wiring all the way from door lock relays in the left ip electrical center to the door lock actuators is a ok. The order of succession in freezing is always. You should see the voltage polarity toggle with each switch activation. But in more complicated systems that have several ways to lock and unlock the doors the body controller decides when to do the unlocking.

The window down button will not work for all cars as most require the key be in the on position for windows to operate.