what color is the ground wire on the downstream O2 sensor? on 2002 Toyota Camry

I have 2 white which should be heater wires. 1 grey and 1 black

by in Pikeville, KY on November 22, 2012
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2 answers
ANSWER by , November 22, 2012
check out www.bbbind.com for wiring schematics on your vehicle.
ANSWER by , November 22, 2012
black is universal ground