Originally Posted by shoothebunnies
Is there a way of disconnecting the wire from the panel inside and the panel out in the garage to test it short of just trenching everything up and tearing out the floor in 3 rooms of my house to get to the wiring as it passes underneath?
start by dissconnectting the wires from the load side of the
relevent breakers in the main panel.
Turn off the breakers in the sub board in the garage.
Now put a volt meter between the neutral wire and one of the hots,
Check for sure its dead !
Check the other hot the same way.
If both are dead,
then test with an ohm meter between each hot and neutral.
it should be very high or infinate.
If its low then the cable is shorted or damaged.
Be super carefull when working around panels.
Take all the usual precautions and more if you can.
report your findings please !