Just my experience over the years, others may vary. The 7 flat blade connector blade positions are the same the SAE and RV standards, but they use some different color wires for the functions, Hence I say use blade/pin positions not colors. Starting a new project on your Airstream. This will not work with a factory 7-pole harness. 7 Blade Trailer Wiring Connector Flat End Type: 7 Blade Lead Length: No Wire Airstream Project Research Center. Can only be used with a factory 4-pole harness. Fits mounting bracket PK-12711U (sold separately) Fuses and Relays Included. Connects Directly to Standard OEM Connector. This connector provides the following functions: left/right turn, taillight, ground, auxiliary, electric brake and reverse. Upgrades Vehicles From 4-Flat OEM Wiring to 7-Way Connectors. 7 Blade Trailer End Connector A 7 Blade connector is typically used with large trailers (RV and industrial) and is the most popular tow package connector on new tow vehicles. There are plenty of pictures available on line of the SAE standards for both the round and flat blade connectors. Trailer Plug 7 Way blade to 4 Way 5 Way Flat Trailer Connector Plug for Trailer Tow Hitch Car RV Boat Truck, 2 Years Warranty. Installs in Seconds on Vehicles not Factory Pre-Wired. We also have mounting brackets and dust covers. We carry everything from 4-way flat to 7-way RV blade for both vehicles and trailers. I also suggest you go by pin/blade position as far as function not colors. Whether you&039 re replacing an old connector or installing new trailer wiring, CURT plugs and sockets offer reliability and a perfect fit. FREE delivery Thu, Nov 9 on 35 of items shipped by Amazon. If that is the case you will only need the two turn signal wires, the ground and the parking light circuit to make a jumper with a 7 round pin male plug on the truck end and a 7 flat blade female socket on the trailer end to have lights on your car hauler. MECMO 7-Way Blade to 4-Way Flat Coiled Trailer Wiring Harness 7.5 ft, Pure Cooper Trailer Extension Cord, 18-Gauge Heavy Duty Jacketed Cable Trailer Connector Adapter Plug- 7.5ft (90 Inches) 236. That gives them a signal light and multiple stop lights. If you dont follow this your trailer (or tow vehicle) cant be used with any other implement. The separate stop light wire in the trailer plug comes into play mainly on trailers that run two, or more tail lights per side. There is a standard method of wiring a 7-pin trailer connector. If a semi trailer only has one parking/signal light each side on rear, the stop light wire is not used. Most tractors only have one tail light, each side, on the tractor for bobtailing so the brake lights work on the same filament as the signal just like cars and pickups (same for straight trucks). /rebates/2fen2fp2fBK7555014&252fen252fp252fBK755501426tc3dbing-&idnapaonline&namenapaonline&ra1. I know many tractors, and some straight trucks, are wired so the brake lights go through the signal switch, as well as the stop wire in the socket/plug. I suggest you check the operation of the signal lights on your class 8 truck and the round plug.

7 blade trailer plug