Anyone using the AEM UEGO wideband A/F

I need to know which wires are which on the 4 pin power harness, red, black, white and blue.

Red: 12V Power
Black: Ground
White: 0-5V output
Blue: Serial output

so if i’m just using the gauge with the sensor, i just use the power and ground?

yes

Correct… but make sure not to hook up the blue to anything unless your running the aem ems.