What does it mean?
B1274 is a Body (airbags, seat belts, body electronics) fault code. It indicates: Right Rear Heated Seat Hi Indicator Control Circuit High .
Symptoms
- The right rear high heat indicator never illuminates
- The high setting cannot be selected or the heater reverts to a lower level
- Left rear seat heater indicators may work normally
- The fault can be intermittent and triggered by seat movement or rough roads
- Seat heating may otherwise feel normal on the low setting
Likely causes
- Open in the high indicator control wire between the module and the right rear seat heater switch
- Burnt out indicator lamp inside the right rear switch assembly
- Connector unplugged or a terminal backed out under the right rear seat
- Indicator wire shorted to battery voltage from an adjacent circuit in the same loom
- Corroded terminals after moisture reached the rear seat harness
- Module indicator output failure
How to fix it
- Test the right rear seat heater on both settings and note whether the high indicator lights
- Check that the switch and seat harness connectors are fully seated and free of corrosion
- Measure continuity of the indicator control wire from the switch to the module connector
- Check for battery voltage on the control wire while the indicator is commanded off
- Repair the open or shorted wire, or replace the switch panel if the indicator element is open
- Clear the code and confirm that the indicator and the heating element both operate on high