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Power door locks have relays located inside the cabin fuse box. Locate the relays for the door switch and see if they need replacing. If so replace the units.
You should already have relays if you have power doorlocks
Your 1998 F150 has 3 relays for your power door locks : an all unlock relay / a driver unlock relay / and an ALL LOCK RELAY I'm guessing that the ALL LOCK RELAY has failed I'm sorry but I haven't found the location of the power lock/unlock relays on your F150 yet ( does anyone know the location of the power door lock / unlock relays on a 1998 F150 ? )
Check the fuse.
you might have the child safety locks activated
There is a Relay for the Power Door Locks, which I purchased today from Checker Auto parts, but I can not find where the relay is located. I am assuming or hoping that it is the Relay for both the Door Locks and Power Windows.
There are several relays located in the back of the glove compartment behind the door that says "relays". Back there you will find the fuel pump relay, the horn relay, the daytime running lights relay and the power door locks relay (if equipped).
Power Door locks (on passenager side) kickpanel. Windows are in the doors. Others Passenager side front near radiator.
yes aftermarket kits are available the electrical components are already in the door
I'm not a mechanic/technician but I would start by checking fuse # 18 in the fuse panel . Fuse # 18 is a 25 amp fuse for your power door lock relays The fuse panel is on the driver's end of the dash , the cover for the fuse panel is visible with the driver's door open
I'm having the same problem. Relays working fine and door locks have some movement, but do not lock or unlock all the way. Hope we find out the problem.
If the power door locks are not working on a 1999 Honda Civic, check the fuses. It is also possible that water got into the door lock mechanism and shorted out the system.