Re: weight distribution hitch - Saabnet.com Bulletin Board
If it would fit on your car, it's a good idea for a heavy trailer. But not really necessary.
You could wire in a 7 way harness or you could simulate one, as I did, with some relatively inexpensive 4 way. Assuming the trailer already has brakes on it, it is a good idea. In fact, my 9-5 was rated at 3500 lbs. with braked trailers, but 1000 lbs. with trailers sans brakes. Presumably the 9-3 is the same.
The ('02) 9-5 had a connector in the back with all the necessary wires coming in, but not all the pins were installed in the mating connector that came with the hitch. I needed the dealer to install the missing pins. But my understanding is that the trailer wiring in the 9-3 happens by installing a circuit board into a socket located behind the trap door on the left (driver's) side of the trunk.
You also need a brake controller to work electric brakes. An alternative is a hydraulic surge brake on the trailer itself: it does not require additional electrical connections, just the 4 wire.
posted by 65.35.8...
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