Vacuum pump not working

[MuRCieLaGo]

Hi,

'91 ZR-1

I just received a vacuum pump from Paul here on the forum. I tested it on a battery to confirm it works. However, when I plug it in the car, it doesn't work. Key on, start, whatever, I just never hear it. I know the pump is working. Is there any fuse I can check?

Thanks!