How To Wire a Harley Ultra Classic with a 5-Pole Round and a Trailer with a 4 Pole Flat
Question:
I am guess that you have a connector similar to the 5-Pole round like part # PK11502. If this is the case, you have two options. You can either remove the 5-Pole round from your Harley and put a 4-Pole flat in place, or you can cut the connector of your trailer and use a 5-Pole connector for the trailer. I imagine the 5-Pole on the bike is mounted pretty well, so I would suggest replacing the trailer connector with a 5-Pole using part # PK11501. Using a circuit tester, like part # 3808, determine which signal is on which pin on your Harley connector. A 5-Pole round will have a wire for left hand turn and brake light, one for right hand brake and turn light, one for running lights, one for ground and typically the last wire is either for a brake controller or reverse lights. I attached a review video for the # 40376 for you to check out also. Unless your trailer has brakes or reverse lights, you can omit the last wire. Once you have determined which pins do what on the Harley connector, you will attach the wires to the new 5-Pole round for the trailer in the correct positions so they will mate up properly with the Harley connector. Typically a trailer is wired using the following color code: White - Ground, Green - Right turn and brake, Yellow - Left turn and brake, and Brown - Running lights.
asked by: Vic G
Expert Reply:
I am guessing that you have a connector similar to the 5-Pole round like part # PK11502. If this is the case, you have two options. You can either remove the 5-Pole round from your Harley and put a 4-Pole flat in place, or you can cut the connector of your trailer and use a 5-Pole connector for the trailer.
I imagine the 5-Pole on the bike is mounted pretty well, so I would suggest replacing the trailer connector with a 5-Pole using part # PK11501. Using a circuit tester, like part # 3808, determine which signal is on which pin on your Harley connector. A 5-Pole round will have a wire for left hand turn and brake light, one for right hand brake and turn light, one for running lights, one for ground and typically the last wire is either for a brake controller or reverse lights. I attached a review video for the # PTW2993 for you to check out also.
Unless your trailer has brakes or reverse lights, you can omit the last wire. Once you have determined which pins do what on the Harley connector, you will attach the wires to the new 5-Pole round for the trailer in the correct positions so they will mate up properly with the Harley connector. Typically, a trailer is wired using the following color code: White - Ground, Green - Right turn and brake, Yellow - Left turn and brake, and Brown - Running lights.


Billy
2/12/2013
2012 Harley TriGlide.Used a plug and play harness that is a 5 wirebrown,black,blue,orange and red How will this wire uo to a 4pin flat or round plug?? Help is greatly APPRECIATED.

Products Referenced in This Question
Curt Powered Tail Light Converter with 4-Pole Flat Trailer Connector
- Custom Fit Vehicle Wiring
- Trailer Hitch Wiring
- Vehicle End Connector
- Powered Converter
- Universal Fit
- 4 Flat
- Plug and Lead
- Splice-In
- CURT
more information >
Pollak 5-Pole, Round Pin Trailer Wiring Connector - Chrome - Trailer End
- Trailer Wiring
- Trailer Connectors
- Trailer End Connector
- Plug Only
- 5 Round
- Pollak
more information >
Pollak 5-Pole, Round Pin Trailer Wiring Socket, Concealed Terminals - Chrome - Vehicle End
- Trailer Wiring
- Trailer Connectors
- Vehicle End Connector
- Plug Only
- 5 Round
- Pollak
more information >
Product Page this Question was Asked From
Hopkins Tail Light Converter with 4-Way Flat Trailer Connector
- Custom Fit Vehicle Wiring
- Trailer Hitch Wiring
- Vehicle End Connector
- Converter
- Universal Fit
- 4 Flat
- Plug and Lead
- Splice-In
- Hopkins
more information >
Featured Help Information
Instructions
Miscellaneous Media
Continue Researching
- Shop: Trailer Wiring
- Shop: Curt Powered Tail Light Converter with 4-Pole Flat Trailer Connector
- Shop: CE Smith Spare Tire Mount - Lockable - Steel - 4-Lug and 5-Lug Wheels - 8-3/4" Long
- Search Results: am10066
- Shop: Vehicle Tow Bar Wiring
- Shop: Hopkins Custom Tail Light Wiring Kit for Towed Vehicles
- Shop: Trailer Hitch
- Search Results: trailer hitch
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Q&A: What is the Difference Between a Class II and a Class III Hitch?
- Video: Finding the Right Trailer Wiring Harness
- Shop: Base Plate for Tow Bar
- Search Results: trailer wiring
- Article: Trailer Wiring Diagrams
- Video: Curt Powered Tail Light Converter Installation - 2023 Kia Telluride
- Shop: Universal Installation Kit for Trailer Brake Controller - 7-Way RV and 4-Way Flat - 10 Gauge Wires
- Search Results: base plate for tow bar
- Q&A: What Is An OEM Prep Package And How Do I Know If I Have It
- Video: Curt T-Connector Vehicle Wiring Harness Review C56040
- Shop: Roadmaster 4-Diode Universal Wiring Kit for Towed Vehicles - 7-Way to 6-Way Coiled Adapter Cord
- Article: Wiring Trailer Lights with a 7-Way Plug (It's Easier Than You Think)
- Shop: Brake Controller
- Video: An In-Depth Look at the Roadmaster Diode 7-Wire to 6-Wire Flexo-Coil Wiring Kit
- Shop: 7- and 4-Pole Trailer Connector Socket w/ Mounting Bracket - Vehicle End
- Q&A: Recommended Trailer Wiring Harness For A 2025 Hyundai Tucson SEL
- Search Results: trailer brake controller
- Article: How to Measure for Trailer Hitch Drop
- Video: Choosing the Right Tow Bar Wiring
- Shop: Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector
- Q&A: Difference Between Curt and etrailer Trailer Hitch Receivers for 2020 Chevy Colorado
Victor
1/26/2010
I am guess that you have a connector similar to the 5-Pole round like part # PK11502. If this is the case, you have two options. You can either remove the 5-Pole round from your Harley and put a 4-Pole flat in place, or you can cut the connector of your trailer and use a 5-Pole connector for the trailer. I imagine the 5-Pole on the bike is mounted pretty well, so I would suggest replacing the trailer connector with a 5-Pole using part # PK11501. Using a circuit tester, like part # 3808, determine which signal is on which pin on your Harley connector. A 5-Pole round will have a wire for left hand turn and brake light, one for right hand brake and turn light, one for running lights, one for ground and typically the last wire is either for a brake controller or reverse lights. I attached a review video for the # 40376 for you to check out also. Unless your trailer has brakes or reverse lights, you can omit the last wire. Once you have determined which pins do what on the Harley connector, you will attach the wires to the new 5-Pole round for the trailer in the correct positions so they will mate up properly with the Harley connector. Typically a trailer is wired using the following color code: White - Ground, Green - Right turn and brake, Yellow - Left turn and brake, and Brown - Running lights.