There are a lot of people on forums and Facebook spouting ridiculous false information about these gauges. It's a very simple system and is utterly useless.
I made this to try and explain (in a basic manner) how this gauge works and what's actually going on.
As stated in the video, I don't know everything so if I have left something out drop it in the comments.
I also understand that some of the older bullnose trucks used an actual sender. I have one on my 92 IDI that is for an 80-85 or something along those lines.
Enjoy the video!
![](https://s2.save4k.ru/pic/Y2LgrFB7vUI/maxresdefault.jpg)