So, with the pickup disconnected completely the green/white pair is giving no reading/open circuit (1 or out of range), or is that a fluctuating 1 ohm reading you're seeing?
Double-check with a higher range on the multimeter, but it is looking like the coil may be open circuit. From memory, I think Toneriders have the fabric tape obscuring the pickup lead to the coil wire connections, so you probably won't be able to see any fault without tearing it apart.