I am using a Roadmaster Falcon, motorhome mounted, tow bar and a
6 wire coiled electrical interface cable between the two.
I use 4 wires in the 6 wire cable for brake and turn signal lights on the car and the other 2 wires in conjunction with a Brake Buddy brake controller on the car. This is the third car that I have towed with this coach and the Saturn has proven to be the easiest to hook up and unhook yet and it tows like a dream.
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This is our 1996 Saturn SW2 Tow Car or TOAD. It is equipped with a Roadmaster removable tow bar interface which allows us to take all visible interface components off when we are not expected to be towing, like in the winter.
One wire provides me with a remote indication when the Brake Buddy is activated and the other spare wire provides about 2 amperes of charge current to the Toad's battery.
The latter may not be necessary but I have discovered that towing for long periods in stop and go traffic with the Brake Buddy will place considerable drain on the Toad battery.
I will be more than happy to provide more details on this system to anyone who is interested.
The Saturn is also equipped with a standard 4 inch hitch receiver which we use to carry our bikes via a Reese bike carrier.