They are supposed to be operated on a variable flasher unit so that the sequential sequence finishes before it resets it.
99% of the time they operate as a on/off light. Every now and then I can get one or two sequential sequences out of it. which leads me to believe it's an electrical problem.
Could anyone give me some pointers on where to start? I have some basic skills so have no problem testing , removing and soldering components back in.
second hand units, both left and right act the same. unknown brand.
Looking again, the socket connections around the IC pins are also showing what looks like green corrosion.
Cleaning them may help?
I don't think there would be any varnish on a socketed component; too likley to creep and mess up the connections.
Also, on the top surface the markings appear to be showing as depressions rather than different colour, suggesting ink or similar rather than a protective layer
Looking again, the socket connections around the IC pins are also showing what looks like green corrosion.
Cleaning them may help?
I don't think there would be any varnish on a socketed component; too likley to creep and mess up the connections.
Also, on the top surface the markings appear to be showing as depressions rather than different colour, suggesting ink or similar rather than a protective layer