Where is my fuse for my unlock button on my 2004 Malibu

There is a relay in the rear fuse block for the trunk release. marked trunk relay #36. It is marked on the under side of the lid. If you knew how they worked you could open it by jumping pin 30 to pin 87 in fuse box. on the side of the relay is a diagram of what pins are what . This system uses an electronic control module called ( the BCM ) body control module .When you push the inside release button , that sends a signal to the BCM ,then the BCM activates the relay opening the trunk . Well that won't help ,you won't believe where the fuse box is ! Fuse Block - Rear
In the rear compartment, behind the left wheel well. You could jump the wire at the BCM that goes to the relay. Can't you pull down one of the rear seats to gain access ?

Try disconnecting the horn itself from the circiut,hold the horn button on for a while,if the fuse no longer blows,it's a safe bet the horn itself was the culprit,if it still burns the fuse,the wiring or clockspring are shorting out

I think the fuse cover might be on the drivers side of the dash. Can only see it when the door is open. After removing cover I think the inside of the cover gives you a description of each fuse location.

Try pressure on the trunk cover with the key turning the locking mech. Also spray loosening oil in it as well. If this doesn't work u might have to remove the back seat. Check fuses befor u take this step or drilling it out. Hope this helps.

No fuse in installed in these circiuts just a relay. The switch will be at fault for these always get dirty inside causing dirty contacts which give no continuity to the circuits

there is relay its marked accery maybe more than one check them

stand right next to the car and hold both the lock and unlock buttons down at the same time untill the locks cycle about 15 seconds

Remote control door lock reciver an the BCM - body control module control the locks . The key switch is a electrical input to the BCM , the BCM controls the door lock actuators . Your best bet ,have it towed to the dealer .

Close all the vehicle doors.
Insert the ignition key into the ignition lock cylinder.
Press and hold the DOOR unlock switch.
While holding the DOOR lock switch in the unlock position, cycle the ignition ON, OFF, ON, OFF.
Release the DOOR unlock switch. The doors will lock and unlock to confirm the program mode.
Press and hold the LOCK button and the UNLOCK button simultaneously on one keyless remote. After a delay of approximately 15 seconds , the doors will lock and unlock to confirm the programming of that transmitter.
Repeat the previous step to program up to four transmitters.
Turn the ignition switch to the RUN (one more click forward) position in order to exit the keyless entry transmitter mode.
Operate the transmitter functions in order to verify correct system operation

I had the same issue on my 2005 Malibu. They unlocked over and over, 5-10 times at a time, then would stop for a bit, then would do it again. I had to replace the remote to fix.