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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...
Also check the starter relay on the driver's side fender, and the solenoid on the starter itself. The mini starters that Ford started using in the early 90's have a solenoid that both engages the starter gear, and open/closes the high current supply to the starter. The relay on the fender simply switches the solenoid on and off.
I'm not exactly sure of what a starter interrupt relay is. If I had to venture a guess, I'd say it has something to do with an anti-theft system or perhaps is part of the neutral start or clutch on off switch.
Thanks for all the tips/info. I went under the hood and cleaned up a bunch of the electrical connectors, relays, etc., etc. and have the not had the problem since. I don't know if that was necessarily the problem, but it works for now. So for now, I'm going to go with the "if it ain't broke, don't fix it" theory...
I looked it up in my EVTM last night and the starter interrupt relay is part of the anti-theft system. If the relay isn't part of the GEM, then it appears that it can be easily jumpered if you don't care about retaining the starter kill.
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