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2005 F250 No crank/ No Start---but only in the morning
First time post. Been lurcking for a while. I hesitate to post, because I'm sure the info I'm looking for is already here just can't find it. So here's what I'm dealing with.....
The truck: 2005 F-250 auto tranny 230k miles. New to me, but very well maintained. Notably, just put in two new Optima Yellow Top batteries and a new alternator.
1. Replaced alternator day before yesterday with O'reilly's standard issue remanufactured alternator. Truck started and ran several times with no problems, belt properly returned to all pulleys, everything seemed fine.
2. Next morning, truck would not crank (i.e., turn over) or start. When key is in on position everything works as it should. When turning the key to the start position, nothing happens--no clicking, no dimming of the dash or interior lights, nothing (I do believe the relays clicked, but that's it).
3. After work, went to begin diagnosing the issue, but when I turned the key, it started right up without hesitation. Drove the truck around all evening with no problems.
4. This morning, went to start the truck and had the same issue as yesterday morning (no crank, no start, no clicking). Weather here in North Texas is mild with an overnight low of around 54 degrees, so it's not terribly cold.
Given the intermittency of the problem, I have no idea where to begin. Oh yeah, truck is not indicating any diagnostic codes.
Thanks in advance