After my hondata install and tune It seems like when I slow down, break, and rev my engine my headlight brightness changes anyone know what this could be im pretty sure its not my altenator because it has been goin on for over 6 months

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wow i have the same problem. from 0 to 45mph if im pressing the gas the lights (headlights and interior lights) go dim and if i let off they get bright again. but if im going over 45 they are bright and dont go dim until i get under 45. my problem is my vehicle speed sensor. idk how that has to do with it but i put in a buddy of mines and everything was fixed. my car idled smooth and no wierd light dimming.
new VSS was 173$ at dealer. ouch