Trailer Wiring Harness Included With Stealth SH94VR Hitch for 2013 BMW 335 Convertible  

Question:

Expert Reply:

To get the towing ball mount, you'll need to order the # SH94VR hitch kit, which includes the # SH94VR hitch, plus the towing ball mount attachment and the trailer wiring harness. Unfortunately, Stealth Hitch doesn't offer the ball mount portion individually.

There is good news, though. I spoke with my contact in the Tech Services department at Stealth. We discussed how you're wanting to use the Tekonsha # 119250KIT ZCI wiring harness. We both agreed that the Tekonsha ZCI is a quality product that usually works very well, however they aren't completely without issue. The sensors are sensitive to bleed-over from adjacent circuit which can cause the harness to malfunction. The taillight converter/harness included with the # SH94VR hitch would NOT require any cutting or splicing of your factory wiring. It uses install clamps that are similar to a quick connect or scotch lock but rather than almost cutting the wire in half like the scotch locks do, the connectors included with the kit make a small piercing in the wire to contact that circuit for what I would consider a more reliable connection. I was told that the connectors included with the kit are actually the same ones BMW uses and obtains from a 3rd party manufacturer. The harness would honestly work very well for you.

I've linked to a diagram from the installation instructions that shows the wire color coding you'd need to use to install the trailer connector harness.

expert reply by: Mike L

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Wiring Connections for Taillight Converter Included with SH94VR Stealth Hitch
(click to enlarge)