I recently lost power to two rooms in my house. I've checked for those little switches above the electrical outlets, but there aren't any in my home. I spoke to a relative who had me test a few things, and he said there is a bad wire somewhere in the wiring. I would hire an electrician but we're trying to save money right now, so I'd rather do this myself. Is there a device i can use to test the wiring in the house to find this bad wire? Better yet, how should I go about doing this?