Sensor 2, Replacement Harness For Part Number 7766 Replacment Wiring Harness For Sensor 2 Of The Ntk Wide Band O2 Module Part Number 7766 MSD IgnitionThe MSD Power Grid Dual NTK Wide Band O2 Module is a dual channel air fuel ratio (AFR) system designed to interface with the Power Grid (PN 7730) to monitor and record the AFR of internal combustion engines. The MSD Wide Band O2 Sensor module also provides a 0. 5 4. 5 VDC analog output proportional to the AFR. This analog output can be sent to a gauge or a data acquisition system. A dual color LED provides the system status at a glance. The Dual Wide