The speedometer works, the odometer does not. Does anyone know what type of signal should be present in the small wires that the odometer driver needs? There are three small wires soldered to pins that are near a magnet. It seems like some type of generator that spins when the correct signal is present that in turn moves the odometer gears. Is there any schematic or repair procedure out there to fix these?

Cars & Trucks - Alfa Romeo - Quadrifoglio - 1987 Alfa Romeo Quadrifoglio