Driver Seat Forward Switch Circuit High Voltage
The B1719 code indicates that the driver seat control module (SCM or DSM) has detected an abnormally high voltage on the driver seat forward switch circuit. This circuit monitors the switch signal that requests forward seat movement. A 'short to battery' means the wiring or the switch itself is presenting battery voltage (12V) constantly or at an unexpected time, instead of the controlled reference signal the switch should send when pressed. The module interprets this as a fault condition because it cannot correctly determine the switch state.
1. Commonly Affected Makes
2. Most Common Causes
- Faulty driver seat switch with internal short circuit
- Wiring in the switch circuit shorted to a 12V power wire
- Corroded or bent pins in the switch or seat control module connector causing a short
- Seat control module (SCM/DSM) with internally damaged input circuit
- Aftermarket modifications or damage to the seat wiring harness
3. Symptoms You Will Notice
- Driver seat may not move forward when the switch is pressed
- Seat may move forward unexpectedly without switch input
4. Step-by-Step Diagnosis
Check for technical service bulletins (TSBs) related to seat wiring or switch issues
Inspect the driver seat switch and its connector for damage, corrosion, or bent pins
Test the switch circuit for a short to battery voltage using a multimeter
Check the wiring harness for chafing or pinched wires that could contact 12V sources
If wiring and switch are okay, test the seat control module for proper operation
5. Frequently Asked Questions
Is it safe to drive?▼
Yes, it is generally safe to drive, but the seat may not adjust properly or could move unexpectedly, which could be a distraction. It is recommended to have it diagnosed and repaired soon.
How much does it cost to fix?▼
The cost typically ranges from $100 to $300, depending on whether the switch, wiring, or module needs replacement. Diagnostic fees may add $50-$100.