I've only ever did it using the FORD IDS.
First find out what the code is,you'll need a scantool capable of both C and B code retrieval iirc.
Most common issues in my experience would be seatbelt switch and PAD switch if I were playing parts darts.

To reset light,pull the fuse (For some reason I'm thinking fuse 15 is generally srs).
Turn key to on,the SRS system will run self checks on startup. When checks are complete and clear then light will shut off.
Get a code with your scantool and i've still got factory service dvd's going back 10yrs or so and they might help.
If not I can cruise up to ford and just look it up on their system when I get a chance,along with the diag tree.