Checked fuses holders with continuity light. Low beams, ok. Hi beams fuse holders have very low current on the bottom terminal ( barely makes the light glow) when the switch is in the hi beam position and the fuses are out. When the circuit is completed by connecting the holder terminals with light connected to both ends there is no current. When the fuses are inserted and the continuity light grounded to the frame then touched to the top end of the holder there is no current. Seems that whenever the circuit is completed by inserting a fuse or otherwise no current flows. Any ideas??????????? Help!!!!!!!