77 Ford F250, what happened?

[incubustwo003]

Hey guys, i have a 77 f250 4x4 with a 351, recently i replaced the alternator but ran into a problem, the alternator i had on had three wires to it and three spots to hook up to, the new one had five spots to hook up to so i wasnt exactly sure where the wires needed to go, the only one i was sure of was the battery wire, since i have hooked it up all the lights get brighter when i give it gas and today i was pulling out of my driveway and my headlight blew, could i have mixed up the two wires? would this cause my headlight to blow?

 

[144289]

small red wire is the field, usually has an F in back of the alternator, usually close to where the battery wire is hooked. The other one is the stator, I think its white, away from the other 2. You might have a stuck voltage regulator