Knock sensor problem

[stcloudgsx]

I've installed 3 different knock sensors in my 1991 gs-t and it's still causing a check engine light. I have no idea what would cause it anymore because i'm pretty sure that 2 new knock sensors are disfunctional. any thoughts? thanks
Anthony

[acidrumz]

Did the CEL threw the knock sensor? wires may be loose, cut...

late.r
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