Door locks keep blowing fuses - 2004 Chevrolet Blazer

SOURCE: Security Light always on, door lock fuse keeps blowing

This is most likely a problem with your Passlock anti-theft system which is known issue with these cars. Passlock is a "passive" anti-theft system, which means that it will disable your ability to start the car if it thinks there is a problem. The three components that can cause this are: 1) Ignition Switch, 2) Ignition Cylinder, 3) Body Control Module (computer). The dealer is the only one who can solve this problem (unless you can bypass it, but it is not that easy). Estimated repair from most dealers is $800 and up.

SOURCE: keep blowing out auto door lock fuse

after you replace the fuse try closing the door and put the key in and turn it back and forth locking and unlocking it and see what happens when you use the power lock
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SOURCE: my door lock and window lock keep blowing my fuses

It is blowing fuses for a reason. You probably have a wire shorted to ground somewhere. You should get a test light and start tracing wires in your door panel. It may be obvious once you remove the door panel. It could be a faulty window motor or lock motor as well, but I doubt it. Get yourself a haynes manual, it will have the wiring diagram.

Testimonial: "thanks alot.will post the results later."

SOURCE: Auto door lock on drivers

The most common cause of a single door lock not to work, is a bad door lock actuator (also called a door lock solenoid). Another common problem or cause of door locks not working is simply a bad door lock switch. But as per your problem, power window/ lock switch needs to be replaced.If the door lock fuse blows when door lock switch is depressed, then its quite possible that door lock switch is shorting.Bypass the door lock switch and connect the door lock switch wires directly to each other and then see if the door lock fuse blows with car key in on position.If the fuse is not blowing, then connect passenger side switch to driver side switch and then operate and see if the fuse blows.If not, then driver side door switch is faulty and needs to be replaced.-------- ---------- This will help.Thanks.Helpmech.