I have a battery pack holder. I have tested the batteries with my multi meter. It appears that the ground and power wires on my pack holder are not working. Does this mean that the wires are not connected inside the battery pack holder?
Most battery holders are made of 3 things. The plastic case, metal springs and tabs, and wire. The springs are mostly press fitted, held by friction. Sometimes there is a switch and power led.
Failure point is almost always the wire, or solder holding the wire to a spring or tab. The fix is to solder new wire in its place. Try not to keep the soldering iron on the metal for too long as you can melt the plastic, ruining the holder. That's all there is to it.