What Does B1708 Mean?
This code indicates that the Body Control Module (BCM) or Seat Control Module has detected an abnormal short-to-ground condition in the circuit controlling the driver's seat recline rearward switch. The control module detected that the voltage in this switch circuit dropped below expected levels, indicating current is flowing directly to ground instead of through the intended circuit path. This prevents the seat recline motor from responding properly to rearward recline commands.
Common Causes
45%
Damaged or chafed wiring between the seat switch and control module causing short to ground, often from seat rail movement or pinched harness
30%
Faulty driver seat recline switch with internal short to ground or contamination from liquid spills
15%
Corroded or damaged connector pins at seat switch or module connection allowing moisture intrusion and ground contact
10%
Faulty seat control module with internal circuit failure or damaged ground reference circuit
Diagnostic Steps
1
Step 1: Perform visual inspection of driver seat recline switch and surrounding area for liquid damage, debris, or physical damage. Remove switch assembly and inspect connector terminals for corrosion, bent pins, or moisture intrusion.
2
Step 2: Using a digital multimeter, disconnect the seat recline switch connector and measure resistance between the recline rearward switch signal wire and ground with switch in rest position. Reading should show infinite resistance (open circuit); any continuity indicates a short to ground.
3
Step 3: If switch tests good, trace the wiring harness from switch to seat control module, checking for chafed, pinched, or damaged wiring especially at flex points where seat slides or reclines. Perform resistance test on isolated circuit wire to confirm no short to ground in harness.
4
Step 4: If wiring is intact, disconnect seat control module and measure resistance from the recline rearward switch signal wire terminal at module connector to ground. Infinite resistance confirms module internal fault; any continuity confirms external wiring fault.
5
Step 5: Repair or replace identified faulty component (switch, wiring, or module). Clear codes, cycle seat recline switch through full range of motion multiple times, and verify code does not return and seat operates normally in all directions.
Estimated Repair Cost
$125 - $650
Parts + labor, varies by vehicle and location
This code indicates that the Body Control Module (BCM) or Seat Control Module has detected an abnormal short-to-ground condition in the circuit controlling the driver's seat recline rearward switch. The control module detected that the voltage in this switch circuit dropped below expected levels, in...
The most common cause of B1708 (Seat Driver Recline Rearward Switch Circuit Short To Ground) is: Damaged or chafed wiring between the seat switch and control module causing short to ground, often from seat rail movement or pinched harness
Typical repair costs for B1708 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 operation or safety to drive. The seat recline rearward function may be inoperative, but this is a comfort convenience issue that should be addressed at earliest convenience to maintain proper seating position adjustability.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to B1708 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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