here you go
for the ECM, sorry i left that part out
you do not need the extra 7 pin if your not running electri brakes
You need a 7 pin circular to 4 pin flat adapter. www.trailvoy.com
sfn
You need to specify what type of connector. Most likely, you'll be using a seven blade connector, although six pin, five pin, and four pin connectors are also a possibility. The latter two would only be used if your trailer was not equipped with trailer brakes.
www.wimtv.be/techniforum/files/crt2574_deh-3300r.pdf page 51 shows pin out diagram.
The hitch on my 2002 comes with a 4 pin flat plug. But it really depends on the trailer plug. There are adapters for the 5 pin round plugs but you need a brake controller if your trailer has brakes.
To test a trailer harness with a multimeter, first ensure the vehicle is connected to the trailer and that the vehicle's lights are on. Set the multimeter to measure DC voltage and probe the appropriate pins on the trailer connector based on the wiring diagram for the harness. Activate the turn signals, brakes, and running lights one at a time to check for the correct voltage at each pin. If the readings match the expected values, the harness is functioning properly; if not, there may be a fault in the harness or vehicle wiring.
If it is the factory radio, then the pin-outs diagram should be stamped into the metal on the radio it-self.
try the12volt.com i know for a fact thay have one Try http://www.ahdol.com/ for the diagram.
To properly connect brake lights for a trailer using a Honda Ridgeline, you typically need a wiring harness that matches your vehicle model. The Ridgeline often has a 7-pin or 4-pin trailer connector, and you should ensure that the wiring harness includes a brake light function. Installation involves connecting the harness to the vehicle’s electrical system, usually at the rear, ensuring all connections are secure to prevent any malfunction. Always consult the vehicle’s owner manual or a professional for specific wiring diagrams and instructions.
A pin connection diagram is a visual representation that illustrates the arrangement and connections of pins in an electronic component, such as an integrated circuit or connector. This diagram typically shows the pin numbers, functions, and electrical connections, helping engineers and technicians understand how to interface the component with other parts of a circuit. It is essential for ensuring correct wiring and troubleshooting in electronic design and assembly.