Im trying to connect a 3rd brake light to a 99 camaro is the green wire postive
Hi William, To begin, the usual color coding on American vehicles is black is ground. To test this, take a long length of cable and a test light. Connect one side of the test light to battery positive and and the other cable connect to the black wires one at a time. If the light comes on normally you have proved the ground connection, then do the same with the other. Next connect the test light to the green cable and the other cable to the black. Press the brake pedal and observe if the light illuminates. If all is well, connect the black cable from the third brake light to the black cable of your car and the red cable from the after market brake light to one green cable from your car an insulate the other. Then go ahead and mount the third brake light. Regards John
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