Connect the cable to your computer and after connecting the cable install the driver below. A new "Port" will appear under "Ports" after the cable is plugged in (you can see the ports and other things in Windows Device Manager) and it needs this driver, not the one that windows installs:-
Read the instructions on FES for setting the port options and set it up correctly.
Then go back to the port settings again and make sure they haven't changed - they do sometimes!
Start FES and set the correct port number for the cable in FES.
Now time to connect to your car.
The OBD connector is in the fuse box under the steering wheel.
Connect the cable to the car noting that you do not need an adaptor to connect to the engine ECU. The adaptors are for airbags and other stuff.
Ignition key must be on.
Tell FES what car you have and tell it to connect.
If it doesn't connect it will be one of six things;-
1. Your ignition is not in the "MAR" or ON position. The engine does not need to be running but ignition must be on.
2. The car connector pins have surface corrosion. Just unplug the cable and plug it back in a few times - that is usually enough.
3. You have not installed the port driver.
4. You have not set the port setting as instructed. Note the port settings don't always hold what you set them at. Check them again!
5. There is one reported instance of wires behind the car connector not being connected. Are you good with a soldering iron? Note: this is very rare.
6. You have not pushed the cable connector fully home in the car. The first few times the connector is used it can be VERY tight. It's a bit scary sometimes how hard you have to push. Be careful but be sure the connector is pushed home.
This sounds complicated and can be frustrating but it does work and you will be amazed at what this free software and cheap set of leads can do.