I have a 93 accord ex with power locks. when i hit the lock button the doors unlock, and also when i hit the unlock button. i bought the car last summer, and the previous owner had remote keyless entry installed (after market, the brand is ultra or something like that). I had the problem when i first bought it, then it went away. now Im having the problem again. Is it in the aftermarket keyless entry or the vehicle? It happens when i use the keyless entry or use the button inside the car. the only way i can lock it is if i push down the lock itself on top of the door. thanks