The brake pad warning operates on a very simple system, there is a small sensor that is actually removable and designed to fit in a slot, on the brake pad, usually there are only two, one used on the rear, inserted into one side, and the other is for the front side, again only inserted into one side. or the other. (not four) The proper pads will have this slot made into the pad.
As the pad wear, eventually a small metal piece will touch the brake disc (rotor) and act as a simple switch to turn on the dash light. Generally no reset is necessary, once you break this connection, the light should go out. As the pad wears closer to replacement time, sometimes a car wash or puddle will flood the brake pad, and the light will come on, this really only happens when the pads are very close to be in need of changing. The brake pad warning sensor is a separate connection, on a small loom from behind the brake disc and is the only electrical connection to the brake disc, It is removable and re-useable if not damaged, It must be inserted properly. or you will get these early warning lights even if the pads are new. If the loom is damaged for some reason, it can be changed, it has a plug in connection for this purpose.
In this case, I would check to see if the sensor is inserted properly.