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speed sensor wires testing? also alt pulley size?

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Old 10-21-2009, 06:43 AM
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Question speed sensor wires testing? also alt pulley size?
I am trying to test my speed sensor ( the one on the harmonic balancer). I have a green , red , and black wire. I am trying to figure out where these wires go and what they do?

Also I am looking for the alt pulley size. Long story but I think I have the wrong pulley on my alt.

thanks
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Old 10-21-2009, 10:12 AM
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Only way I know of to test the ESS is with an oscilloscope.
All the wires from the ESS go to the PCM except the black ground wire.
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Old 10-21-2009, 03:57 PM
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k that sounds good now which on is the input and output?
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