Originally Posted by Travilnguy
We used the wires from what we knew had power and was working and connected to the terminals of the speakers in question.
this is kinda why I suggested a 9 volt battery.
another method may depend on an amp or head unit which is suffering intermittent operations.
for example an amp may shut down a channel if it senses an open or shorted circuit= self protection
if this is happening you chase your tail and have inconclusive results
when I refer to speaker phase, this requires looking at the speaker cone( flashlight) to observe whether the battery makes the speaker cne move forward or back