Need wire diagram for AC on a 91 camaro. From one day to another, the AC stopped working and so did the blower fan. The fuse is good. I checked the relay under the hood near the dryer, it is good but the only weird thing that I noticed is that all of the black wires that go to the blower and to the relay shoot out positive voltage. Is this right. All the black wires merge together and are connected to the AC switch in the car. I just want to make sure if the black wire should be ground. I did cut the black wire to the relay and grounded. I noticed that now I can hear it click when I turn the AC on, which it wouldn't before. On the blower side, there are two wires, purple and black. Both are positive. Havn't tried it yet but was also thinking bout cutting the black wire and regrounding it to see if it also works. I'm not getting any ground to the system. Any ideas?