I did a search for this, but didn't find what I was looking for. Hopefully someone can be of some help?

I have a 2000 Ranger Extended Cab 2wd 3.0 V6. It just started having a starting problem. Sometimes it will start, and sometimes nothing except what sounds like a relay 'clicking' under the glove box. I located the relay - it's on a metal bracket mounted directly under the glove box and can be seen from the passenger seat. From looking at the Haynes manual, it appears this might be the Starter Interrupt Relay? As I said, it does 'click' when I turn the key, so is it necessarily bad, or would there be another problem? I checked the battery and it's fine. The radio and everything else works. It just won't start all the time. Sometimes it will start on the first attempt, and sometimes it might take considerably more tries...

Any help is greatly appreciated. Thanks.