error light on motherboard?
where is this component located your looking at?
is it the controller mounted on top above the battery?
or is it a board or component mounted on the frame beside the motor in front of the steering motor?
the traction controller is mounted on the panel on top of the battery, the steering controller or EPS is mounted down on the frame beside the drive motor on the opposide side of the panel in front of the steering motor.
The drive controller probably has an led light on it and if there is an error it would be blinking the code, if there is an EPS error it would be blinking a code there.
in either case the error code should be displaying on the BDI unless it has an old style with no led display on it.