What Does B2513 Mean?
DTC B2513 indicates the Body Control Module (BCM) has detected an electrical fault in the HVAC blower motor circuit. This code is set when the BCM detects abnormal current draw, voltage levels, or an open/short circuit condition in the blower motor fan circuit. The blower motor is responsible for moving air through the HVAC system for heating, cooling, and defrosting functions.
Common Causes
35%
Failed blower motor resistor or power module causing incorrect current flow or circuit resistance
30%
Faulty blower motor with seized bearings, worn brushes, or internal short circuit
25%
Damaged wiring harness, corroded connectors, or loose connections in blower motor circuit
10%
Blown fuse or faulty relay in the blower motor power supply circuit
Diagnostic Steps
1
Step 1: Perform visual inspection of blower motor fuse and relay in fuse box, check for blown fuse or damaged relay contacts. Replace if faulty and retest system.
2
Step 2: Locate blower motor and resistor/power module, inspect all electrical connectors for corrosion, melted terminals, or loose connections. Clean or repair as needed.
3
Step 3: Using a digital multimeter, test voltage at blower motor connector with ignition on and blower switch activated (should read battery voltage 12-14V). If no voltage present, trace back through resistor/power module to locate open circuit.
4
Step 4: If voltage is present at motor connector, disconnect motor and check resistance across motor terminals (typically 0.5-5 ohms). Infinite resistance indicates open motor windings, near-zero resistance indicates shorted windings.
5
Step 5: Test blower motor resistor or power module by checking resistance values across each speed tap according to manufacturer specifications. Out-of-range readings indicate failed component.
6
Step 6: After repairs, clear codes, operate blower through all speed settings for 2-3 minutes, and verify no codes return and proper airflow is restored at all fan speeds.
Estimated Repair Cost
$100 - $450
Parts + labor, varies by vehicle and location
DTC B2513 indicates the Body Control Module (BCM) has detected an electrical fault in the HVAC blower motor circuit. This code is set when the BCM detects abnormal current draw, voltage levels, or an open/short circuit condition in the blower motor fan circuit. The blower motor is responsible for mo...
The most common cause of B2513 (Blower (Fan) Circuit Failure) is: Failed blower motor resistor or power module causing incorrect current flow or circuit resistance
Typical repair costs for B2513 range from $100 to $450, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Vehicle is safe to drive, but lack of blower function eliminates heating, air conditioning, and windshield defrosting capabilities which can significantly impact visibility and occupant comfort. Repair should be completed soon, especially in extreme weather conditions or if windshield defrosting is compromised.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to B2513 to identify the root cause.
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Quick Info
Category
Body
System
HVAC Climate Control System
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
A quality scan tool helps you read codes, view live data, and clear faults.
