The car would not start at the repair shop. It was dead with no dash lights just as I described. He checked the starter, the battery, fuses/relays and looked for any loose wires. He found nothing wrong and made no repairs. He tried to start it again and it started fine. He shut it off and restarted it a dozen times and it worked every time. He kept it overnight (outside his shop) and it started the next morning. I picked it up after work that same day and it started on the first try. I took it home and it sat overnight (outside - not in a garage). The next morning it's dead again. This time I had it towed to a dealership because my mechanic said he's too busy and isn't familiar with this problem.
If I have a fuse or electrical problem would it be intermittant or would it happen every single time?