so i beeen tryin to help my friend figure out what is wrong but we have no clue, he wired in a dual dvd/cd touch screen in his 01 prelude base model and the lights worked for a few hours then when we were leaving our chill spot his running lights, dash , and city lights in the headlights wouldnt come on. any ideas on what could be wrong? its been like this for about a week and we still dont know.

we have checked all fuses but not sure how to check a relay,

we thought maybe a bad ground when he wired the stereo? the stereo is out now however the lights still do not come on..

any help would be great thanks!