I've gotta stand by Wrenchbender on this one. You'll save a lot of headache if you buy a good harness. A "good" harness will have marked wires with a diagram AND written instructions telling you where each wire attaches. Cheapest isn't always best.

Save a life, adopt a senior shelter pet.
The three main causes of blindness: Cataracts, Politics, Religion.
Name your dog Naked so you can walk Naked in the park.