Hello, I have a 1973 classic Range Rover. I know they have two flasher units, I’ve found the hazard but not the indicator one. The dash is out so you have good access. I’ve found a larger 3 pin round unit, does anyone know what that is? See pictures. All of the indicators light up, but don’t flash, the wiring has been tampered with before I got the car, any ideas anyone, thanks Phil