Blew A Gauge Light, Help

[Julzillionaire]

Hi all,

I was remounting my boost gauge as it feel off. All done and when i turned on the light to test... no light. I did not touch any wiring except i was twisting and touching the gauge to the right way up. I followed the wire, one was grounded and the other went through the fire wall to the driver hand side lights... yesterday the driverside parker blew when i was installing the new passenger side headlight bulb.

Theories??

Tomorrow Ill hit everything with a multimeter. If i need to replace the blub... where do i go to find one?