Ford Replacement OEM Tow Package Wiring Harness, 7-Way If you are using the Ford Replacement OEM Tow Package Wiring Harness, 7-Way # 118242 on your 2006 Ford F-150, that is most likely the issue. That harness only is compatible with models up to 2004. For your 2006 F-150, you will either use the 4 way # C56031 to give you a 4-way trailer connection or # 74682 if you are replacing a 7-way connector.4.8/5(201)Category: Custom Fit Vehicle WiringPrice: 51 7 pin wiring harness | eBay www›Search›7 pin wiring harnessFind great deals on eBay for 7 pin wiring harness. Shop with confidence. Skip to main content. eBay Logo: 05 thru 07 F-150 OEM Genuine Ford 7-Pin Trailer Tow Wiring Harness Connector NEW. Brand New OEM Genuine Ford Parts from a Ford Dealership. Brand New. 5.0 out of 5 stars.