So my buddies coupe won't start. He left his lights on and drained his battery, tried to get it jumped, didn't work. Replaced the battery, and it still wont start.

Nothing in his interior gets power, no dash lights, climate control, radio, map lights, nothing, headlights don't get power, and the car won't crank.

But for some reason his brake lights still work when pressed. We checked the starter, low beam headlight, and "light" fuses. All checked out.

Can anyone give us some advice or some more things to check out?

 

Check all the grounds.