After searching through many threads I haven't pinned down what my issue could be.

My 2004 FX HO is slow to start. What I mean is that when I first click in the lanyard key the "Security" light shines bright. I then push the green starter button and nothing happens (no sound, the Security light stays on, nothing else).

If I wait 15-30 seconds then it will turn over and fire right up and then run perfectly. I have tried clicking and unclicking the lanyard key but not seems to make much of a difference. I just keep pushing the button until I hear the starter.

Any ideas? I charged the 2 year old AGM battery fully and checked the cables that show no sign of corrosion.