YES... Radio will not power up without it (ignition sense wire).
Mark - N9WYS -----Original Message----- From: [email protected] On Behalf Of mikewm9v spectra radio dead from ebay want to fix this radio no display need schematics need to know if radio will power up without control head has front panel pcb has power in entire unit do i need ignition sense hooked up recapped display board and will recap other boards will sit down with other boards and scope out radio used but not too abused have mic also have extra wavetek 2000b monitor 15 years as bench tech for radio shack i did all the scanners and amateur radio equipment for them wm9v
