License plate light 71 malibu

[mikejr0007]

Having trouble getting the license plate light to work.(once installed) The bulb is new and works. I have all other lighting working properly. I tested the light on the battery by touching the single wire+ and then touching the light metal at the same time -. Is there any easy fix? I have a new chrome bumper on it, so I assume the ground is good. Just no power to the light when I put on the parking lights? I am hoping it is an easy fix... Thanks in advance. I just want everything working now that I'm almost ready to drive it down the road.