The other day the left side of my car was the only thing working. I found that my battery was dead (6v) so I swapped it out for a new one. When I put on the battery leads I heard a pop and now nothing inside the car works. I’m getting 10v to the left and right controllers and only 5v to the rear dc/dc converter terminals of the car. Any idea what this may be? Fuses? Maybe a bad front controller? And what should the voltages be to the left and right controllers and the dc/dc converter Terminals?