I've recently bought an 89 GL, with power everything. The door locks are really easy to unlock, but every single door has a problem locking. If you push it by hand it locks, but you have to push pretty hard. The power lock won't work because the little motor can't push hard enough to lock it all the way, it does fine unlocking it though. This makes it really annoying to lock my car because I have to open every door and lock it manually after locking the driver's side with the key.
Does anyone have any advice on how to loosen these locks up to get them working again?