Im going to change some caps in my amp and was wondering how to tell if they have any charge in them. I really don't feel like having my heart stop yah know? hah.

Epi Les Paul Custom w/ 57 classic plus & burstbucker pro
Gibson SG Limited Edition, Crescent Moon Inlays
Dr. Z SRZ-65
Egnater 4x12 cab w/ Vintage 30s
I think, back in my car audio days, i used to use a small light bulb, like from a flashlight to drain the caps down and to charge them back up.