Igaly1021

Ok guys I need some help in stalled the map switch correctly, but I decided to change the switch to a button switch. the led light that come in the buschur kit I notice is controlled by 2 negative wires (1 is constant negative, the other wire is negative but only shows current when I flip the switch). The new switch I bought has a built in led light so I grabbed the negative from the original buschur kit led and put it in the switch negative + negative. So my question is the second negative that only comes on when I flip the switch, do I need to find a seperate ground for it?