I can't get my equinox to start after changing the headlights. When I put the key into the ignition I get a whinning sound from the engine compartment and the cabin lights flicker. Once I try to turn it over I hear a click in the engine and then all the power seems like it is instantly drained. It seems like a short but I can't find one and I tried taking the new headlights out again and looking at the wires. Any ideas?