What Does B1424 Mean?
This diagnostic trouble code indicates that the Body Control Module (BCM) has detected an abnormal voltage condition in the rear right power window motor circuit. Specifically, the circuit is showing a direct connection to battery voltage when it should not be energized, suggesting a short to power in the wiring, switch, or motor itself. This condition can cause the window to operate erratically or remain inoperative, and may drain the battery or damage the window motor or control module.
Common Causes
40%
Damaged or chafed wiring harness between door jamb and rear door causing short to power
30%
Faulty rear right window motor with internal short to power
20%
Defective window switch with internal short circuit
10%
Water intrusion or corrosion in door connectors causing voltage bleed
Diagnostic Steps
1
Step 1: Visually inspect the wiring harness in the door jamb area between body and rear right door for chafing, pinching, or visible damage. Flex the harness while monitoring for voltage changes on the motor circuit.
2
Step 2: Disconnect the rear right window motor connector and measure voltage at the BCM side of the harness with ignition on and window switch not activated. Reading should be 0V; battery voltage indicates a short to power in the harness.
3
Step 3: If harness shows no voltage, disconnect window switch and retest motor circuit. If short clears, replace the switch. If short remains, inspect and test the motor for internal short using an ohmmeter between motor terminals and ground.
4
Step 4: Check all connectors in the rear right door for water intrusion, corrosion, or pin damage. Clean or replace connectors as needed and apply dielectric grease.
5
Step 5: After repairs, clear codes and cycle the window through full operation multiple times while monitoring live data for proper voltage levels and motor current draw (typically 3-8 amps depending on vehicle).
6
Step 6: Road test with multiple window operations and verify code does not return. Check BCM for any additional stored codes that may have been masked by primary fault.
Estimated Repair Cost
$100 - $450
Parts + labor, varies by vehicle and location
This diagnostic trouble code indicates that the Body Control Module (BCM) has detected an abnormal voltage condition in the rear right power window motor circuit. Specifically, the circuit is showing a direct connection to battery voltage when it should not be energized, suggesting a short to power ...
The most common cause of B1424 (Power Window RR Motor Circuit Short To Battery) is: Damaged or chafed wiring harness between door jamb and rear door causing short to power
Typical repair costs for B1424 range from $100 to $450, depending on the vehicle, location, and whether you do it yourself or go to a shop.
This is a non-critical fault that does not affect vehicle safety or drivability. The vehicle is safe to drive, though the rear right window may not function properly and there is a minor risk of battery drain if the short provides continuous current draw.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to B1424 to identify the root cause.
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Quick Info
Category
Body
System
Body Electrical System
Difficulty
Type
Manufacturer
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