What Does B1732 Mean?
This code indicates the Body Control Module (BCM) has detected a short to ground condition in the driver's seat rear vertical adjustment switch circuit. The BCM monitors the switch inputs and has identified that the rear down switch signal wire is experiencing an abnormal low voltage condition, indicating a direct path to ground. This fault prevents proper operation of the rear portion of the power seat's vertical adjustment function.
Common Causes
45%
Damaged or pinched wiring harness under the seat causing short to ground contact with seat frame or track
30%
Faulty driver seat switch assembly with internal short to ground
15%
Corroded or moisture-damaged switch connector terminals creating ground path
10%
Failed seat control module or internal BCM circuit fault
Diagnostic Steps
1
Step 1: Visually inspect the driver seat switch assembly and all visible wiring under the seat for obvious damage, chafing against metal components, or pinch points where seat tracks could compress wires. Move seat fully forward and backward to expose all wiring.
2
Step 2: Disconnect the driver seat switch connector and inspect terminals for corrosion, moisture intrusion, or pushed-back pins. Using a digital multimeter, measure resistance between the rear down switch signal wire terminal (at the harness side) and ground with switch disconnected; reading should be infinite (open circuit). A low resistance reading confirms short to ground in wiring.
3
Step 3: If harness tests good, test the switch itself by measuring resistance across the rear down switch terminals with switch unpressed (should be open/infinite) and pressed (should show continuity). Check for unintended continuity between switch terminal and switch housing ground.
4
Step 4: If wiring and switch test good, inspect seat motor harness and seat control module connector for damage. Check BCM connector and wiring at BCM for moisture or corrosion. Clear codes, reconnect all components, cycle seat functions, and verify code does not return.
5
Step 5: If short is intermittent, perform wiggle test on all connectors and harness sections while monitoring live data on scan tool to identify location of intermittent ground fault.
Estimated Repair Cost
$100 - $650
Parts + labor, varies by vehicle and location
This code indicates the Body Control Module (BCM) has detected a short to ground condition in the driver's seat rear vertical adjustment switch circuit. The BCM monitors the switch inputs and has identified that the rear down switch signal wire is experiencing an abnormal low voltage condition, indi...
The most common cause of B1732 (Seat Driver Rear Down Switch Circuit Short To Ground) is: Damaged or pinched wiring harness under the seat causing short to ground contact with seat frame or track
Typical repair costs for B1732 range from $100 to $650, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Safe to continue driving as this only affects power seat adjustment functionality. The seat position will remain stable and secure; only the rear vertical adjustment control is impaired. Repair at convenience unless seat is stuck in uncomfortable or unsafe driving position.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to B1732 to identify the root cause.
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Quick Info
Category
Body
System
Power Seat Control System
Difficulty
Type
Manufacturer
Recommended Tools
OBD2 Scanner
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