Q: Central locking is no longer working.

asked by on

The remote locking had just stopped working on my trailblazer. I have two sets of remotes and neither of them are working with the car currently. It was totally random just came back from a trip and it wouldn't lock but had been fine the rest of that day. I have tried re-programming the remotes to the car as I was t sure if the dog standing on the door button may have caused it to disconnect somehow however this doesn't work and I have today tried replacing the remote batteries and trying to reprogam again but this hasn't worked either. The doors were locking/unlocking with the button on the door panel but this is no longer unlocking now either. The trunk doesn't have a key entry point so it currently will not open. Do you have any idea what could be wrong with it? and is this easier to do ourselves? If not, what sort of price it is likely to cost to repair it?

My car has 212720 miles.
My car has an automatic transmission.

It sounds like your vehicle has a problem with the body control module, mainly because you said the power locks are also inoperative from the door panel. The first thing I would suggest is to check the fuses, then have the body control module scanned. This might give you a fault code to work with or to help diagnose the issue. It may simply be a blown fuse. Beyond that, not much can be done without a test light, wiring schematic, and a good working knowledge of automotive electrical systems. At that point, I would recommend having the locking problem diagnosed by a professional technician.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!
  1. Home
  2. Questions
  3. Central locking is no longer working.

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Q: Transmission slipping.

Hello. Fluid pressure is used inside the automatic transmission to convert the engines rotation into working torque. Any major leak inhibits operations, fluid pressure cannot build properly, and the transmission starts to slip as it cannot transfer the power. There...

Q: Getting fuel, getting spark, and won't start.

Check the ignition timing on the distributor and see if the timing is off. If the timing is good, then the accelerator pump in the carburetor or the fuel injectors are not working properly (if your vehicle has TBI injection)....

Q: 2004 chevy trailblazer a/c starts to blow hot air when I tow my camper

Hi There, It sounds like you may have a condenser fan that may not be cooling the AC condenser properly. As you may know, the job of the AC condenser fan is to cool down the AC condenser as it...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.