Hello, need some help, just replaced all the light bulbs on a Perkins engine control panel
and when I replaced it the oil
pressure gauge and alarm
buzzer did not work, however the light on the panel does work and the buzzer and gauge works when tested, I found a pinched wire and had approx 9.5 volts to ground when tested, when the wire is reconnected still nothing works, atop the buzzer there is a small diode assembly however that is the only part untested, does anyone know what the assembly is for and how does the oil
pressure circuits work as the light does come on, sorry to be so long winded.