Question about 1993 Subaru Legacy
I have a 1993 Subaru Legacy. The power door locks dont work. The front passanger and the rear seat doors will not unlock. I have to physically mash in on the lock lever and pull up on the outside latch at the same time to open the doors. I have checked the fuse and it is ok. Does any one have a good idea?
If it takes that much force to manually open the doors, and it's on the doors that are less used, then I'd bet it's a set of door locks and actuators in need of lubrication.
Electric door lock actuators can easily be stopped or slowed down by resistance in the mechanism. This can be caused by corrosion, water getting into the door, and just old age and lack of use. I'd take the door panels off and take a peek.
On the Legacy the panels pop off fairly easily. You'll need to pry them off carefully with a flat screwdriver. You'll feel where the fasteners are, where the panels are resisting coming off, and prise the panel gently and firmly at these points and they'll pop out. Once out you'll see the lock mechanism.
Moving it by hand will tell if it's corroded or bound up. Apply some white litium grease to the mechanism, making sure to squirt/work it in, and then work the door handle/mechanism to get the lube into the linkage and actuators. Check the electrical contacts for corrosion while there and spray with WD-40 to protect them. This should free up the door mechanism and the actuators should then be able to do their job.
If after the above steps the electric actuators still don't work, use a voltmeter or circuit tester to check for 12V at the actuator when the door button is pressed. If you don't see any power, recheck that fuse and then the wiring back to the door harness. It's unlikely that this is the cause as its unlikely that you'd get only 3 out of 4 bad, but you never know in these old cars.
Hope this helps.
Posted on Dec 28, 2008
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