Johnny: I'm not familiar with that particular model, but if the wavemagnet was working, I don't see why Zenith would add an extra wire to run around the cabinet. Perhaps the wavemagnet wasn't working, and someone added a wire for local reception. Check the wavemagnet connections with your ohm meter and see if if the coil is open somewhere. See the schematic for pin-outs on the connector. The coil itself is probably okay, but perhaps the hook-up harness or connector has an open.
Steve
wade
:I'm finally getting into my 10S668. Upon removal of the cardboard Wavemagnet box I noticed there is a wire that comes out of the plug and routes around the inside perimeter of the radio cabinet. Is the routing of this wire standard equipment on this model?