oil pressure switch

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got a b16 90 hatch si with a pr3 have wired and rechecked, rewired my oil pressure switch tones of times, checked and made sure its in the right pinout and that the ecu has the pin, i cant figure out why its not working its the only engine code im throwing and its stealing my b16 power and was wondering how i can test it or fix this problem.
thanks in advance
 
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