Remember: Ford OEM part ONLY.... Just a few $$$ more but it will work.. Disconnect the battery for 15 minutes and then reconnect so it will re-calibrate with the new part. Not usually needed but sometimes...... You know the drill..
straybullitt is correct, it makes a howling noise when it dies.
Kind of weird in fact.
That's what mine did but for me it was a bad electrical connector.
It was on, off, on, off,on off...etc... Really weird.
Same idea though