15-05-2024, 10:56 AM
Hello Ian
I am not familiar with this box, so let's hope someone else had one and has saved the paperwork.
In the meantime I can offer the following:
The wire colours are standard for households in the UK, Brown for Line, Blue for Neutral and Green/Yellow for Earth/Ground. I don't know how these were used in this application, but they don't accord with any car wiring standard.
What I would expect to see is a passive semiconductor regulator IC, which takes a +12 volt input and drops it to a regulated +6 volt output. This will also need a ground connection, and since grounding via the metal case is a bit tenuous (especially if its mounted on glass fibre !) there is likely to be a dedicated earth wire.
The most likely allocation is therefore Brown for 12 v in, Blue for 6 V out and Green/Yellow for Earth, but don't rely on this educated guess alone !
Since the "wasted" 6 volts in a passive regulator means a certain amount of heat dissipation, this sort of unit would most likely be used for relatively low consumption items like the fuel gauge. I doubt it would be man enough to power lamps or motors. There is a possibility that its a more advanced design called a switching regulator, which is more like 95% efficient and has more capability.
If you still get no joy, take the lid off. If its not full of resin then a photo will allow further thought.
I am not familiar with this box, so let's hope someone else had one and has saved the paperwork.
In the meantime I can offer the following:
The wire colours are standard for households in the UK, Brown for Line, Blue for Neutral and Green/Yellow for Earth/Ground. I don't know how these were used in this application, but they don't accord with any car wiring standard.
What I would expect to see is a passive semiconductor regulator IC, which takes a +12 volt input and drops it to a regulated +6 volt output. This will also need a ground connection, and since grounding via the metal case is a bit tenuous (especially if its mounted on glass fibre !) there is likely to be a dedicated earth wire.
The most likely allocation is therefore Brown for 12 v in, Blue for 6 V out and Green/Yellow for Earth, but don't rely on this educated guess alone !
Since the "wasted" 6 volts in a passive regulator means a certain amount of heat dissipation, this sort of unit would most likely be used for relatively low consumption items like the fuel gauge. I doubt it would be man enough to power lamps or motors. There is a possibility that its a more advanced design called a switching regulator, which is more like 95% efficient and has more capability.
If you still get no joy, take the lid off. If its not full of resin then a photo will allow further thought.