Hi all

Newbie here

Picked up this 2013 with a bunch of mods done.

A problem i have is there are no working brake lights, in that when you start the ending they are on permanently, the after a while they go out but when you depress the brake nothing happens. So i removed the panel under the steering wheel and saw that there is no brake light switch there at all the hole in the bracket has no switch in it, then the grey harness connector is just dangling there. Then there's 2 items attached to the lower part of dash a black device with a knob and the a brown box with a red button and a + and _ button. This brown device my son thinks could be a trailer brake and then thinks maybe they wired that up and forgot to out the brake light switch back in as there is a red wire that piggy backs to the connector to the brake light switch and disappears thru the door with other harness. The black thing he thinks could be associated with the amp

Any suggestions would be greatly appreciated
Thanks in advance