Auto Meter Air/Fuel Guage?

[KILLA5OH]

I hooked up the Air/Fuel Guage as Directed..The three wires before the oxygen Sensor i was told you use. My question is... I get no read out on the Guage and when i turn my lights on it goes off..which means i hooked up the 12v Source wrong. Which color wire to the oxygen sensor do i hook it up to?? I'm pretty lost at this point.
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88 GT,70mm Throttle Body & EGR,BBK Fenderwall Induction,Aluminum Driveshaft,T-5 Worldclass,Flex-Fan,Underdrive Pulleys,Headers,H-Pipe,3.73 Gears,GT-40 Intake and Flowmasters,MSD 6AL Ignition,190 Fuel Pump, MSD Ignition, B303 Cam, 1.6 Rockers, Crane Pushrods & Lifters, 75mm Bullet, Lakewood 50/50's, BBK Upper & Lower Control arms, BBK K Brace, Subframe Connectors, Eibach Springs, Throttle Responce enhancer.