Electronic – Identifying components in an electric fencer output board

I'm just looking at an electric fencer output board at the moment, it's not plugged into the fencer, I'm just testing the components are it has a fault. I'm having trouble with these here though, they read ol for resistance, no capacitance, nothing in diode mode, so scratching my head on what on earth they are, as they have no kind of marking either. They just have a white end, and straw coloured other end, but seem to have no electrical properties according to my multimeter, so not sure if they are just damaged or what.

Edit
Here is the circuit