I talked to a guy over at hcs, He fiqures that the alt does not switch on and off fast enough, that why I am getting the battery light to flash on and guage to quiver. It is putting out 14.8-15.8v all the time. Is alright when running down the road but at stop signs it looks like I am a cop with the lights lightly flashing.
Did you go over to www.ford-trucks.com and see what you could find there? I know theres a lot of boneheads who post on that site, but there is a vast wealth of knowledge there and somewhere Id bet there is an answer to your problem.
Considering its the 2nd alternator you have tried, I cant believe its something wrong with the alternator. Its gotta be some stupid little thing that regulates the electricity thats messing it up.
I obviously dont have the answer, but it just seems like too much of a coincidence that 2 different alternators did the same thing.
I made a thread on FTE about it, heres the link: http://www.ford-trucks.com/forums/559045-headlights-and-dome-light-have-slight-flicker-at-idle.html#post4228188
Not sure if they will have an answer for you, but I think its your best bet.
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