PWM out ports confused

[DavidGitz]

We were helping out a Rookie team at the Stl Science Center on Sunday and they were having a problem with their RSL light/RSL indicator on the Sidecar, neither would flash. The first indication to me was the Ribbon cable issue. They were using the new Ribbon cable but had not fixed it, as they didn't hear about this issue. We swapped our DB37 cable with theirs and the RSL came on immediately. It is interesting though because their drive was working* (although I don't know for sure if their PWM channels were flipped as well) but after the cable swap their drive was working normally. Interesting failure mode for the Ribbon cable.