What Does B1724 Mean?
This code indicates the Body Control Module (BCM) has detected a short to ground in the driver's seat rearward adjustment switch circuit. The BCM monitors the voltage signals from the power seat switch assembly and has identified that the rearward movement circuit is reading near 0 volts, indicating an abnormal electrical path to ground. This affects the power seat adjustment system and prevents normal operation of the rearward seat movement function.
Common Causes
45%
Damaged or chafed wiring harness under the driver's seat causing a short to the seat frame or floor pan
30%
Failed or internally shorted driver seat switch assembly
15%
Corroded or moisture-damaged connector terminals at the seat switch or seat control module
10%
Faulty seat control module with internal short circuit
Diagnostic Steps
1
Step 1: Perform visual inspection of the driver's seat switch and all wiring harnesses under the seat. Check for obvious damage, chafing against seat tracks, pinched wires, or signs of liquid intrusion. Move the seat fully forward and rearward to inspect all harness routing.
2
Step 2: Disconnect the driver seat switch connector and measure resistance between the rearward switch circuit terminal (refer to wiring diagram for specific pin) and ground. Reading should be infinite ohms (open circuit). If reading is near 0 ohms, the short is between the switch and BCM.
3
Step 3: With switch disconnected, measure resistance from the BCM side of the harness connector (switch side disconnected) to ground on the rearward circuit wire. If reading shows continuity to ground, trace and repair the short in the harness between switch and BCM. If no continuity, suspect the switch itself.
4
Step 4: If harness tests good, reconnect harness and back-probe the switch connector with a multimeter. Operate the rearward switch and verify proper voltage signal (typically 5V or 12V reference). If voltage drops to ground when not pressed, replace the seat switch assembly.
5
Step 5: Clear the DTC code and operate the seat rearward function. Verify proper operation and confirm no code returns. Monitor live data for seat switch status during operation to ensure proper signal recognition by BCM.
Estimated Repair Cost
$125 - $650
Parts + labor, varies by vehicle and location
This code indicates the Body Control Module (BCM) has detected a short to ground in the driver's seat rearward adjustment switch circuit. The BCM monitors the voltage signals from the power seat switch assembly and has identified that the rearward movement circuit is reading near 0 volts, indicating...
The most common cause of B1724 (Seat Driver Rearward Switch Circuit Short To Ground) is: Damaged or chafed wiring harness under the driver's seat causing a short to the seat frame or floor pan
Typical repair costs for B1724 range from $125 to $650, depending on the vehicle, location, and whether you do it yourself or go to a shop.
This code does not affect vehicle safety or drivability and the vehicle is safe to operate. The only impact is loss of power rearward seat adjustment functionality, which may affect driver comfort and seating position but does not create a safety hazard.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to B1724 to identify the root cause.
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Quick Info
Category
Body
System
Power Seat Control System
Difficulty
Type
Manufacturer
Recommended Tools
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