How to use the fault code reader

[bigdods]

ok, so I've bought myself a fault code reader, now I just have to work out how to use it. Based on the instructions in the bible this is what I think I have to do, does this look right ?

1. Plug in fault code reader
2. switch igniton on
3. Disconnect fault code reader then plug back in
4. switch ignition off wait for main relay to drop out
5. Switch ignition on, if there is a fault the number will be displayed.

If there is more than one repeat steps 3-5 will show the next code.

Cheers

Dodsy