Recommended Trailer Wiring for 2013 Audi S5 Convertible

Question:

Hello, Is this what i need to be able to tow a small trailer? Whats the difference between this and C59496? BTW, I installed the C11188 Trailer Hitch. It works great and fits my car perfectly!

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Expert Reply:

I'm glad to hear that you're happy with the hitch you purchased!

Curt hasn't tested a wiring harness on your vehicle, so they couldn't make a recommendation. The correct harness will depend on what kind of wiring system your S5 uses. You'll need to use a circuit tester like part # 40376 on the circuits feeding the taillight assemblies to determine whether your vehicle uses a 3 wire or a Pulse Width Modulation (PWM) system.

If you discover that the running light, turn signals and brake lamps are all carried on different circuits, you have a 3 wire system, and the # C59496 would be recommended. If you find that one wire carries the running lamp AND the brake lamp circuit, and another two carry the turn signals, then you have a PWM system, and the # 119190KIT is what you'd need.

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Michael L

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