What Does B1423 Mean?
This code indicates the Body Control Module (BCM) has detected an open circuit in the rear right power window motor circuit. An open circuit means there is a break in electrical continuity between the BCM and the window motor, preventing current flow. This condition is identified when the BCM commands window operation but receives no feedback or detects infinite resistance in the circuit.
Common Causes
40%
Broken or corroded wiring between BCM and rear right window motor, often in door jamb flex area
30%
Failed rear right window motor with internal open circuit or burned winding
20%
Loose, corroded, or disconnected electrical connector at motor or BCM
10%
Blown fuse or faulty power window relay preventing power delivery to circuit
Diagnostic Steps
1
Step 1: Perform visual inspection of rear right door wiring harness, especially in door jamb flex area where door opens/closes. Look for chafed, pinched, broken wires or damaged insulation. Check all connectors for corrosion, bent pins, or looseness.
2
Step 2: Access the rear right window motor connector and disconnect it. Using a digital multimeter, measure resistance across motor terminals. A functional motor should show 3-8 ohms typically; infinite resistance confirms internal motor failure.
3
Step 3: With motor connector still disconnected, backprobe the vehicle harness side connector. Check for battery voltage (12-14V) on power supply wire with window switch activated in both up and down positions. Check for good ground continuity (less than 1 ohm) on ground wire to chassis.
4
Step 4: If no voltage is present at motor connector, trace wiring back toward BCM checking for breaks. Use continuity test between BCM connector pins (consult wiring diagram for pin locations) and motor connector to identify open circuit location.
5
Step 5: After repairs, clear codes, operate window through full range of motion multiple times, and verify no codes return. Test window operation from both door switch and master switch to confirm full functionality.
Estimated Repair Cost
$120 - $450
Parts + labor, varies by vehicle and location
This code indicates the Body Control Module (BCM) has detected an open circuit in the rear right power window motor circuit. An open circuit means there is a break in electrical continuity between the BCM and the window motor, preventing current flow. This condition is identified when the BCM comman...
The most common cause of B1423 (Power Window RR Motor Circuit Open) is: Broken or corroded wiring between BCM and rear right window motor, often in door jamb flex area
Typical repair costs for B1423 range from $120 to $450, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Vehicle is safe to continue driving as this only affects rear window operation. Repair is not urgent but should be addressed for convenience, security, and to prevent water intrusion if window is stuck in down position.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to B1423 to identify the root cause.
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Quick Info
Category
Body
System
Body Control and Power Accessories
Difficulty
Type
Manufacturer
Recommended Tools
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