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What wires go where on the o2 sensor harness there are 4 wires per side?
Wiki User
∙ 16y ago
one is for the negative, one for the positive, 2 for the heater circuit. Best idea is to buy a "direct fit" O2 sensor that is a complete unit and has a plug on it so there is no guess work with wiring. Direct fit O2s are not that much more money.
Wiki User
∙ 16y ago
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