Question about 1998 Saab 900
Passenger door will not unlock. Also lock is in place on fuel door. When attempting to unlock the door no noise is heard. Will not unlock using the key or manually pulling up on the lock. Neither door handle will open . Have tried pulling both at once and that didn't work. Drivers door unlocks fine. Is there a relay that controls the passenger side door? Where is located on the car.
Try swapping the door switches to see if that corrects the problem. Each door is not controlled by a relay. If one door has power, they all have power. Look at the body control module too. All door lock functions go thru it.
Posted on Aug 13, 2017
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Posted on Jan 02, 2017
SOURCE: 1999 Saab 9-3 Turbo Convertible
you need to spend some time triing the best you can to get the top of the door panel open a bit to see what is broken inside, most likely a clip.The other thing to try is a slim jim to get the door open then repair the door lock.
Posted on Aug 20, 2008
CHECK FUSES FOR POWER WINDOW,CHECK FUSE FOR POWER MIRROR AND CHECK FUSE FOR POWER DOOR LOCK.IF FUSE OKAY DOOR CONTROL MODULE FAULTY ITSELF.
Posted on Sep 11, 2011
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Mar 20, 2016 | 2009 Buick Lucerne
Sep 16, 2015 | Cars & Trucks
DOOR LKS fuse
Driver door lock actuator
Driver door lock switch
GMLAN serial data link
Keyless entry transmitter
Passenger door lock actuator
Passenger door lock switch
Remote control door lock receiver (RCDLR)
The DR LCK fuse supplies battery voltage to the body control module (BCM) for the power door lock system. The BCM supplies and monitors a reference voltage to the driver and passenger door lock switches through the door lock switch lock/unlock signal circuit. Each door lock switch receives ground at G300 which is also the ground for the door lock and unlock relays located in the BCM. When a door lock switch is placed in the lock position, the reference voltage is switched to ground and the BCM senses 0.0 volts on the door lock/unlock signal circuit. When a door lock switch is placed in the unlock position, the reference voltage is switched to ground through a 1.5k ohm resistor that is internal to each of the door lock switches and the BCM senses approximately 2.9 volts on the door lock/unlock signal circuit. The BCM interprets what position the activated door lock switch was placed in based on the voltage drop.
The BCM, upon receipt of a lock or unlock switch signal, will switch the appropriate door lock/unlock relay coil control circuit to ground causing the appropriate door lock/unlock relay to energize. With the relay energized, voltage is applied to the door lock actuator control circuit causing the door to either lock, or unlock depending on what command was received from the power door lock switch or remote control door lock receiver (RCDLR). When a power door lock/unlock relay is not energized, the switch contacts are normally grounded through the BCM which provides ground to the appropriate door lock actuator for the lock/unlock function being performed. The power door lock/unlock functions are performed by reversing the flow of voltage through the door lock actuator control circuits. The BCM has three internal drivers for the power door lock system. Driver door unlock, passenger door unlock and all door lock. This is done to isolate the driver door lock actuator so it can be unlocked separately from the passenger door. For additional information concerning keyless entry, refer to Keyless Entry System Description and Operation.
This is one you may want to take to dealer or some other ASE certified repair shop ! To do this right you need a Tech 2 scan tool !
Ignition ON, observe the scan tool Door Lock Switch parameter while using the driver and passenger door lock switches. The parameter should change from Idle to Lock and Unlock.
If the value does not change, refer to Door Lock Switch Malfunction.
Command the doors to LOCK and UNLOCK with the scan tool, the door lock actuators should LOCK and UNLOCK when changing between the commanded states.
If one or more doors do not LOCK or UNLOCK, refer to Door Lock Malfunction.
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