7 pin socket wiring diagram - 2004 Ford F150

Pin 1 - Signal (Green/Yellow) Pin 2 - Signal Return (Grey/Red) Pin 3 - Signal (Orange/Red) Pin 4 - +5V Reference (Orange/Yellow) Pin 5 - Ground (Black) Pin 6 - Not Used

https://www.narva.com.au/resources/trailer-plug-wiring-diagram

https://www.narva.com.au/resources/trailer-plug-wiring-diagram

make a 5 pin plug ---- trailer wire ---- 7 pin socket
converter cable
5 socket 7 pin round plug
Pin 2 to pin 1 left turn wire yellow
pin 3 to pin 3 Earth return to body of car
pin 5 to pin 4 right turn wire green
pin 6 to pin 6 brakes light red wire
pin 7 to pin 7 Tail light Brown wire

if it is a rectangular 7 pin then
5 socket 7 pin rectangular plug
Pin 2 to pin 1 left turn wire yellow
pin 3 to pin 3 Earth return to body of car
pin 5 to pin 4 right turn wire green
pin 6 to pin 6 brakes light red wire
pin 7 to pin 7 Tail light Brown wire
refer to narva wiring diagrams to check
could use a 12v dc probe to sus out what the pins do.
might be able to buy a converter cable from a car spare parts shop maybe or make it yourself

A wiring diagram comes with the trailer plug socket , they come in six or seven pin.

i know few
error codes/ fault codes, wiring d iagrams, schematic diagrams, torque specs, engine info, switches functioning, assemble, disassembly, complete refurbish, repair, installation every single thing is covered
within seconds u can get the access and it's totally illustrative complete

Check for a blown fuse.

There is a relay in the under hood fuse box , blower motor relay .When switched to high it energizes the relay allowing power from the HVAC fuse /30 amp to flow direct to the blower motor. from pin 30 to pin 87 , if you look on the side of the relay there is a diagram .For all other speeds the current flows from the switch through the resistor through pin 87a to pin 30 on to the blower motor ! Check the HVAC fuse in the under hood fuse block .IF the fuse is good check for continuity between the fuse side with out B+ that means pulling the fuse and using a volt meter to see which side has power and checking the side that doesn't have power to pin 87 at the relay socket ! Probably a bad fuse or stuck relay . Pull that relay and try a different one. You can get wiring diagram at www.bbbind.com click on technical information ,then click on Technical Service Bulletins & Wiring Diagrams .then on next page go down to the bottom and click on I agree . next page click wiring diagrams ,then just fill in you vehicle information .then HVAC system . click on diagram, then you will see 7 links , click on the 5th one and that's the diagram for the blower motor circuit !

I can not assist because you do not say what the 7 pin socket is to be used for, what the configuration of the socket is, and if it's for a car or truck, what the make and model of the vehicle is.
The more information you can provide makes it more likely someone can assist you.

Okay, You can get adapters for the plug-in at Tractor Supply company or many autoparts places. You may also be able to get a FREE chassis wiring diagram online at Autozone.com when you register your vehicle.

Sometimes you will have to upgrade the Flasher to accomodate more lights, but wait until you get the wiring figured out. The 7 pin can be for more functions than your car can support. Some covers on the connector will have infomation about what funstions each socket provides.

WIRING DIAGRAM FOR 12N TYPE 7-PIN Black socket or plug
for vehicle road lights
Colour Terminal Purpose Looking at the Socket towards the plug.
Looking at the Plug towards the socket. Yellow 1 (L) LH Indicator Blue 2 (54G) Rear Fog Light (or Aux.) White 3 (31) Earth Green 4 (R) RH Indicator Brown 5 (58R) RH side Light Red 6 (54) Stop Lights Black 7 (58L) LH Side Light

black socket, black 7 core wire
pin 1 yellow left indicator
pin 2 blue, rear fog light
pin 3 white earth
pin 4 green right indicator
pin 5 brown right side/tail light
pin 6 red brake lights
pin 7 black left side/tail light

Grey socket grey 7 core wiring
pin 1 yellow, reverse
pin 2 blue, supplementary feed (ignition)
pin 3 white, earth
pin 4 green live feed (battery +)
pin 5 brown not connected
pin 6 red supplementary feed (ignition)
Pin 7 black earth

On the discovery there is a purpose made plug behind the panel on the drivers side rear, behind the rear lamp
i think the relay you have bought is for lamp failure you just need a normal 4 pin 30 amp relay.
Good luck Davelee