Skip the auto shop - Our mechanics make house calls
  1. Home
  2. Articles
  3. Symptoms of a Bad or Failing Door Lock Relay

Symptoms of a Bad or Failing Door Lock Relay

door lock relay

Power door locks are a feature that has nearly become a standard feature on many newer vehicles. They make the task of locking the vehicle’s doors as simple as pressing a button on the key fob or inside of the vehicle. The door locks are electronically controlled, and as is the case with many other automotive electrical circuits, they will run their power through a relay.

The door lock relay is the relay responsible for sending power to the door lock actuators so that they can lock and unlock the vehicle. When the relay fails or has issues, it can cause problems with the operation of the door locks. Usually a bad or failing door lock relay will produce a few symptoms that can alert the driver of a potential problem that should be serviced.

Power door locks function intermittently

One of the first symptoms of a possible problem with the door lock relay are door locks that function intermittently. If the door lock relay has any internal or wiring issues, it can cause the door locks to function intermittently. The door locks may function correctly one moment, and in the next will cease to operate. This can be an inconvenience to the driver when trying to lock or unlock the vehicle.

Power door locks do not function

Power door locks that do not function are another common symptom for a problem with the door lock relay. If the power door lock relay fails, it will cut off power to the entire power door lock system and may cause them to not function correctly. For vehicles equipped with door lock cylinders, the door can still be opened using the key. However, vehicles without door lock cylinders will not be able to lock or unlock the doors until power is restored.

For vehicles with traditional style door lock cylinders and keys, a bad power door lock relay will merely disable the power door lock feature. For vehicles without door lock cylinders, however, this may make entering the vehicle difficult if not impossible if the doors cannot unlock due to a bad relay. If your power door lock system is having any issues, or you suspect that your relay may be having a problem, have the vehicle inspected by a professional technician, such as one from YourMechanic, to determine if your car needs a door lock relay replacement.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
Still not sure about your car's issue?
Diagnose your car
What kind of issue are you experiencing?
Brakes are squeaking
Car is not starting
Car is overheating
Car is shaking (vibrating)
Fluids are leaking
Heating and A/C
Smoke or steam is coming out of the car
Warning light is on
Icon-warranty_badge-02

Skip the repair shop, our top-rated mechanics come to you.

At your home or office

Choose from 600+ repair, maintenance & diagnostic services. Our top-rated mechanics bring all parts & tools to your location.

Fair & transparent pricing

See labor & parts costs upfront, so you can book with confidence.

12-month, 12,000-mile warranty

Our services are backed by a 12-month, 12,000-mile warranty for your peace of mind.

Get A Quote

Need Help With Your Car?

Our certified mobile mechanics make house calls in over 2,000 U.S. cities. Fast, free online quotes for your car repair.

GET A QUOTE

More related articles

How Long Does a Fuel Filler Neck Last?
Getting gas from the pump to your gas tank is the only way to keep a car going. The fuel filler neck is a metal tube that is welded to the...
How Long Does a Vacuum Brake Booster Check Valve Last?
The braking system on your car requires a lot of pressure. The vacuum booster is one of the main sources of this pressure. This booster will take the pressure that...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...


Related questions

Q: Can't open door from outside

Generally, the outer door handle itself is the issue. You will want to get this repaired as soon as possible; if someone hits the child lock switch, you will not be able to open the door at all. You may...

Q: I have a 05 Chevy impala that the ignition switch won't turn. Is there a way to free it so my spare will start the car

Hey there. The 2000-2005 Chevy Impala models are included in the GM Ignition Switch Recall. You should contact your local Chevy dealer with your VIN (Vehicle Identification Number) and/or go to the safercar.gov website to check your VIN number for...

Q: Can the horn/alarm be permanently disengaged or disconnected?

Hi there, thanks for writing in. It seems the problem is that one or more of the door latches is not closing completely when the door is closed, therefore the car will activate the door ajar light switch cause the...