Ford E150 Door Lock Unlock problem

Changing out your relays might solve your problem of door Lock and Unlock. I had previously changed out all the door actuators and had no luck I did find 2 broken wires previously and the door switches worked but the locking started to fail again Had to walk around the Van and lock the doors manually This van did not originally come with a remote. The remote was included when the Alarm system was installed. The relays were filled with corrosion after years of usage this is a 1994 Ford Econoline use a wire brush to clean off the corrosion it looked greenish. Be sure to use the same Volts and amps of the old relays that you remove. Door switches and remotes on all door actuators now work great. Hope this helps out. Note if all the doors are locking and not locking or opposite then you won't need to change out the actuators