Hello! New here. The back up camera on my daughters 2014 Malibu is not working. It is just black with no sound. It does show the text that says check surroundings for safety. I dont believe it is a fuse because everything else is working. Now she said it came back on at one time but went back off. I tried wiggling wires but no luck. Does anybody know what it could be or if theres like a diagram of the wires. Thanks in advance for any help.