i have an old rubber bodied torch that i use, i push the pedal down with it then wedge it at the base of the panel, as the torch is rubber it grips the angled surface and holds the pedal down in place whilst i wander to the back and have a gander, it was never any good as a torch, the batteries used to go flat in a couple of weeks even without use but it makes one heck of a brake light tester.