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I know where the VSS buffer is, there are three wires coming from the speedo head, and I think three wires coming from the buffer.

What wire hooks up to the TBI ecm input(wiring diagram says its brown)?

p.s. I have cruise control
 

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Wire diagram don't lie. The VSS has the wires going from the optical pick up behing the speedo to the yellow box. The brown wire plugs into the yellow box on the other end.
 
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