I installed the gauge tonight and only one light lights up under the rich side. I have the autometer ultralight gauge. IT has three wires, one for ground one for power and a purple one which i hooked up to the ECU. Anyone know why i am only getting one bar to light up under rich? Thanks in advace for help.

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Jerrome B.
1995 GSX - Race
1997 GST - Drive
1995 GST - Who the hell knows