Thread: The white wire from the external regulator

Hi All,

Is there anyone still running the original external regulator setup that can measure what the white wire does?

I'm pretty sure it should be providing a 12v feed to the ignition, but I'm not sure if it is always on, only when the ignition is on or only when the engine is running.

It supplies a few of the warning lights and while I previously fudged their operation now I have a few days free it would be great to have it all working as it should be.

Cheers!

Yeah thanks chief. I went through a few versions trying to get something that was clean and easy for someone to work with in the future. Ultimately I removed the reg as having two would be confusing, and it is unlikely that I will fit an alt with an external reg in the future.

In the end my problem was that the white wires should be joined (shown on the far right middle of the wiring diagram) and mine had two sections that should have been joined but were not. I had done work arounds for the reverse lights and the oil light but it wasn't clean and would be a pain for someone to trouble shoot in the future as logically if you were troubleshooting and expecting those circuits to be joined you would test it and it would lead you down the wrong path. Because of this I wanted it to match the diag as much as possible (inc cable colours) so I've been very mindful to go back and properly fix anything that works but isn't quite right.

I ended up bridging the circuits as per the diag, and now it's works as it should. The interesting thing about the white circuit is that it is either earthed or +12v depending on if the engine is running or not. This was a bit confusing but makes sense when you think of how the reverse light and oil pressure light work.