What Does B1325 Mean?
This code indicates that the Body Control Module (BCM) has detected a short to battery voltage in the door ajar warning lamp circuit. This means the circuit controlling the door ajar indicator light has an unintended connection to positive battery voltage, causing the lamp to illuminate incorrectly or continuously. The BCM monitors this circuit and sets this code when voltage is detected when it should not be present.
Common Causes
45%
Damaged or chafed wiring harness causing short to power in door ajar lamp circuit
25%
Faulty instrument cluster with internal short in door ajar lamp driver circuit
20%
Faulty Body Control Module with shorted output driver for door ajar lamp
10%
Damaged door ajar lamp bulb socket with terminals contacting power source
Diagnostic Steps
1
Step 1: Perform visual inspection of door ajar lamp wiring harness from BCM to instrument cluster, checking for pinched, chafed, or damaged wires, especially at door hinges and under dash areas where wiring may contact metal surfaces
2
Step 2: Disconnect the instrument cluster connector and use a digital multimeter to measure voltage on the door ajar lamp circuit wire at the BCM connector with ignition on - reading should be 0V; if battery voltage is present, short is in harness between BCM and cluster
3
Step 3: If no voltage found in Step 2, reconnect cluster and disconnect BCM connector; measure resistance from door ajar lamp circuit pin to battery positive - infinite resistance indicates BCM internal short, low resistance indicates harness or cluster short
4
Step 4: Inspect door ajar lamp bulb socket in instrument cluster for corrosion, bent terminals, or evidence of moisture intrusion that could cause internal short to adjacent circuits
5
Step 5: Repair or replace identified faulty component (harness, cluster, or BCM), clear codes, cycle ignition and doors multiple times, and verify code does not return and lamp operates correctly
Estimated Repair Cost
$75 - $800
Parts + labor, varies by vehicle and location
This code indicates that the Body Control Module (BCM) has detected a short to battery voltage in the door ajar warning lamp circuit. This means the circuit controlling the door ajar indicator light has an unintended connection to positive battery voltage, causing the lamp to illuminate incorrectly ...
The most common cause of B1325 (Door Ajar Lamp Circuit Short To Battery) is: Damaged or chafed wiring harness causing short to power in door ajar lamp circuit
Typical repair costs for B1325 range from $75 to $800, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Safe to continue driving as this only affects the door ajar warning lamp functionality. The primary concern is being unaware if a door is actually ajar while driving, which could lead to a door opening unexpectedly. Repair at earliest convenience.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to B1325 to identify the root cause.
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Quick Info
Category
Body
System
Body Control and Warning Lamp System
Difficulty
Type
Manufacturer
Recommended Tools
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