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My wife's 99 Jeep Cherokee has the tow package, which includes an onboard device to make the brake and turn lights work the single bright element on a trailer.Some time ago the brake lights on the car, without a trailer plugged in, began staying on, but very dim. Turning on the flashers and turning them off would stop it until the next time you touched the brake. I solved it temporarily by pulling fuses in the right kick panel box until I found a correction (which also disabled cruise control). I suspect the diodes in the tow package circuit. Does anyone know (or can you point me to a diagram which might show) where the device is that consolidates the brake and turn circuits? Thanks,Bob