# Card Reader LED Behavior
Verkada card readers indicate their current status by changing the color and pattern of their LED lights. Click through each reader to learn more about their statuses and behavior.
AD34
AD33
Here’s what it looks like during normal activity:
Here’s what it looks like during a lockdown:
AD32
Here’s what it looks like during normal activity:
Here’s what it looks like during a lockdown:
AD31
The AD31 is [being phased out in favor of the AD32](https://app.gitbook.com/s/NRq5qDDjsYNxwNzF1bcB/need-help/end-of-sale-products-policy-overview/end-of-sale-announcement-for-ad31). If you’re using an AD31, please see below for the LED states.
**No LED**
The AD31 is not receiving power from the Access Controller’s + and – terminals.
Ensure that the access controller is powered up and that the reader is [wired properly](https://help.verkada.com/access-control/configuration/configure-a-door-in-command/wire-a-door-to-an-ac41-cassette).
**Flashing white**
The AD31 has connected to the access controller, but the door has not yet been configured in Verkada Command. Here's how to [configure the door](https://help.verkada.com/access-control/configuration/configure-a-door-in-command/add-a-door-to-an-access-controller).
**Spinning white**
The AD31 is updating, restarting, or cannot connect to the access controller.
Try directly connecting the reader to the access controller. If the issue persists, try moving the reader to another door cassette.
**Solid white**
The AD31 is active and ready for secure badge entrance.
If the reader stays in this state even when a badge is presented, the badge may not be [compatible](https://help.verkada.com/access-control/installation/badge-reader-support/supported-card-formats).
**Green**
The AD31 has successfully processed a user scan and access is granted.
**Red**
The AD31 has identified a negative read and access is denied.
Ensure the credential has been [added to an access user's profile](https://help.verkada.com/access-control/users-and-credentials/add-a-user-to-the-verkada-access-system) and that there is an [access level](https://help.verkada.com/access-control/users-and-credentials/add-and-modify-access-groups/add-and-modify-access-levels) granting the user permission to unlock the door. If the AD31 is steady red, this indicates that a lockdown scenario has been enacted involving that door.
***
### Wiegand Readers
Third-party readers connected with the Wiegand protocol will follow the lighting specifications of their manufacturers.
All Verkada Weigand connections feature a Reject (RLED) and Grant (GLED) connection for accessory lights and devices. This is most often used to trigger the Red LED or Green LED on a Wiegand reader device.
{% hint style="warning" %}
If your reader is Red by default, you can connect the RLED to a different light colour or follow the directions to change the reader’s default colour as specified by the device’s manufacturer.
{% endhint %}
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