michaelwoosley Posted October 23, 2023 Report Share Posted October 23, 2023 Hello everyone. I have been looking to install a trailer hitch on my wife's 2007 Ford Edge. The issue is NOT hitch related by wiring harness related. When I'm under the back of the Edge, I can look up and see a factory connector sitting just behind the rear bumper cover. It "looks like" it is a connection point for a trailer wiring harness. If it is what I think it is, I cannot understand why different tow hitch receiver company's are selling a wiring harness kit that DOES NOT interface with this connector... their harness' connect to the tail light lense connectors. My wiring schematics even show a trailer connector located behind the rear bumper cover so I'm at a loss on how to approach this... I don't want to purchase something I don't need, when all I REALLY NEED is a simple 1 leg harness that would connect to my factory connection. Does anyone have any experience with what I'm speaking of here? Thanks in advance for any tips towards figuring this out. Quote Link to comment Share on other sites More sharing options...
Haz Posted October 23, 2023 Report Share Posted October 23, 2023 (edited) Welcome to the Forum, michaelwoosley ! If you're seeing an unused factory connector dangling behind the center of the rear bumper cover, then your Edge is likely not equipped with Rear Parking Aid Sensors, and the connector is an Inline Connector C406, looking perhaps like a receptacle version of this... Inline Connector C406 Inline Connector C406 conveys the Rear Parking Aid Sensor circuits and the Trailer Lamp circuits from Ford's grossly overpriced flat 4-pole Trailer Connector C439 (buy an aftermarket connector kit)... Link to Ford's online parts-selling site webpage The more elaborate plug& play wiring harness kits you describe are for owners lacking a soldering iron and high-output hair dryer, but you strike me as being a 'cut & splice'-capable owner. The 2007 Edge wiring diagrams have been updated to some extent, beyond what you show, and includes Smart Junction Box (SJB) involvement in addition to the Battery Junction Box (BJB)... So, you'll be needing to likely verify the SJB fuse & relay and supply the three BJB relays for working Trailer Lamps operation -- in addition to installing a thriftier aftermarket 4-pole flat trailer-side connector. Below are download links to resources I expect will get you across the Finish Line... Document download links> Trailer Tow - Smart Junction Box (SJB) Wiring Diagram - 2007 Edge.pdf Smart Junction Box (SJB) Illustration - 2007 Edge.pdf Smart Junction Box (SJB) Fuse & Relay Legend - 2007 Edge.pdf Trailer Tow - Battery Junction Box (BJB) Wiring Diagram - 2007 Edge.pdf Battery Junction Box (BJB) Illustration, Includes Trailer Tow Relay Locations - 2007 Edge.pdf Battery Junction Box (BJB) Fuse & Relay Legend - 2007 Edge.pdf Trailer Tow - Connector C439 & Connector C406 Locations - 2007 Edge.pdf Inline Connector C406 Details - 2007 Edge.pdf Inline Connector C406 Pin-to-Circuit Identifier-to-Component & Electrical Function List - 2007 Edge.pdf Trailer Tow - Connector C439 Details - 2007 Edge.pdf Ford recommended splicing method.pdf Trailer Lamps - Diagnosis and Testing - 2007 Edge Workshop Manual.pdf If you require any additional information, just let me know -- and please let us all know once you've achieved Trailer Lamps success. It's worth noting that the GEN 1 Edge Trailer Lamps set-up is simpler to add-in than adding Ford's Trailer Tow Module set-up to GEN 1+ & GEN 2 Edges/MKX/Nautilus. Good luck! Edited October 23, 2023 by Haz 1 Quote Link to comment Share on other sites More sharing options...
michaelwoosley Posted October 24, 2023 Author Report Share Posted October 24, 2023 Haz, thanks for all the information you provided. It will prove to be very helpful. Would you happen to know if a pigtail (female sockets) for the C406 is available, versus the entire wiring harness for the parking aid/trailer lighting? My preference is keep everything nice and neat, however, I'm prepared to do some splicing as needed. Thanks for all the reference material (I saved all of it to my Edge OneDrive folder). Every bit of it will prove to be helpful when I'm ready to start setting up my towing kit. Best, Mike Quote Link to comment Share on other sites More sharing options...
Haz Posted October 24, 2023 Report Share Posted October 24, 2023 (edited) Pigtail repair kit pricing is absolutely nuts, perhaps due to supplying conductors for all 16 cavities because of the many applications of the connector across model lines... Link to this FordParts webpage ...when compared to the Service part equivalent to 2007 Edge Trailer Tow/Rear Parking Aid Sensors Harness 14N139... Link to this FordParts webpage ...which includes the 4-pole flat Trailer Lamps connector ... ...compared to the Rear Parking Aid Sensors-Only Service Harness that costs more than twice the price of the above Trailer Tow Harness... Doing web searches of these various part numbers may yield different pricing (and availability?) from other online sellers, compared to FordParts'. You may find Pigtail kits comparable to Motorcraft WPT-1491 on eBay by searching earlier connector designations of WPT-982 and WPT-1142, with pricing just under the Trailer Tow harness, with some connectors shipping from China sources. I expect the connector-side conductors of the Trailer Tow harness for the Rear Parking Aid Sensors could be released and either zip-tied or fully removed from the Trailer Tow Harness' split-corrugated plastic sheathing, leaving only the Trailer Lamps conductors in the female-socketed Connector C406. Additionally, you could be confident the conductor gauging is appropriately sized in the Trailer Tow harness, since conductor gauging in the Pigtail kits is not disclosed. Good luck! Edited October 25, 2023 by Haz Quote Link to comment Share on other sites More sharing options...
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