B1820 BUICK, CADILLAC, CHEVROLET, GMC: DRIVER SEAT RECLINE REARWARD SWITCH CIRCUIT SHORT TO BATTERY
POST UPDATED IN June, 2023
B1820 BUICK, CADILLAC, CHEVROLET, GMC: DRIVER SEAT RECLINE REARWARD SWITCH CIRCUIT SHORT TO BATTERY
When pressing one of the power seat switches, a 12-volt signal is sent through the signal circuits to the Memory Seat Module (MSM). Then, the MSM tells the driver’s seat motors to move to the required position in response to the signals sent by the switch.
OBD2 fault code B1820 is set when a battery short is discovered in the driver’s seat rearward recline switch circuit.
Reasons to set the B1820 OBDII diagnostic code:
To troubleshoot DTC B1820 OBD2, consider this: