I swapped my NA 1996 Miata with a 2000 SE NB Cluster to fix my speedometer cable woes (popped two in less than 10k miles of ownership).

Got to the point of everything functional... except when I have my headlights off and turn signal is initiated (left or right)... my headlights pop up.

Though amusing, I thought I'd ask what I did wrong if anyone has any pointers.

I figure it is something to do with improperly grounding the headlight relay on my model vs others that may not have one.