Right, got my guy to have another go at this and it still came back wrong. Although the boost gauge is working, the needle and face are constantly lit. And he now says that he reckons the oil pressure gauge isn't working properly.
So my question is how do I wire the boost gauge and oil pressure gauge together? They are both 7 colour LED items and I'm not worried about being able to dim the gauges with the dash lights.
I understand on the boost gauge that:
Black = Earth
Purple = Needle
Orange = Dial face/numbers
Yellow = Memory
So in this instance join the purple & orange wires together and attached to switched live, i.e. headlight switch.
Then yellow wire to a constant 12V feed.
Now on my oil pressure I'm a bit confused. I've got 3 connectors and 3 wires. On the connectors I've got an 'S', a '+' and a '-'. Then I've got a black, red and yellow wire.
I'm fairly confident in saying the 'S' goes to the sender. I'm assuming the yellow is the Memory so would need a constant 12V feed. So does the red wire go to a switched live?
I'm assuming the black wire is Earth again. So what do I connect the '+' & '-' connectors to?
I'm so confused!!!
Have a look at the attached pic of the back of the oil pressure gauge if it helps with my explaination. (Although it looks orange, it's a red wire)