I just bought a "new to me" 2011 HHR from a dealer. I asked about getting a back up camera installed and he sent me to an electronics shop that does that. They installed the camera but it keeps going out "black screen". If I just go a short distance it's okay - if I go a longer distance - from the electronics shop to my house - about 9 miles, it gives me the black screen. The electronics guy said he thought it was odd that I"m getting 14 volts but I've been reading that, that is normal to save fuel??? Correct? Is something wrong with my alternator - I thought they were all 12 volts. Can a back up camera be installed on this particular model? I don't want to keep gong back to the electronics shop and would rather have them just take it out and get my money back - I don't have nor want the time to keep going back. Any thoughts, suggestions, etc? Thank you