Airtronics (AM/FM) Trainer Cord
1 - Pin 3 (white) and Pin 5 (black) are crossed. D.I.N. is a european 'standard' originating from Germany. The D.I.N. abbreviation stands for "Deutshe Industrie Norm"
2 - Pin 2 (ground) can be any color but is usual green
3 - In some 5-wire cable the color yellow is replaced by brown
4 - If your trainer cord does not work, try reversing the black and white wire again. (one plug only!)