So I have several Glow shift gauges and just realized a crazy thing today. I’m just about 100% sure I don’t have a oil pressure issue. My gauge will show good pressure until I turn my air system on. At that point my pressure will show zero, the light on the dash does not come on, when I turn my air system off gauge shows good pressure.

I’m wondering if anyone has seen this before. I have attached a clip of this.

 

I had a little spare time today to look into this issue and I found I had a ground issue with the relay controlling the pumps. I used the same ground For the gauge and relay and the connection to the frame had gotten a butt load of corrosion on it and everything was trying to ground through the sending unit causing issues.