5.0Thunder
Active Member
- Jan 31, 2018
- 128
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I usually see 4 main wires coming off the wideband controller. Main positive, Main ground, Signal positive, and Signal ground. I do the main wires to a standard switched 12v source and any standard ground, but run the signal wires to the ECU directly. Been doing this for many installs and always have good agreement between the controller gauge and the Tunerstudio gauge.