knock sensor -- where is it?

[Preston Brown <pbrown@econ.yale.edu>]

With the bentley, I tried to find the knock sensor in my car today (you 
know, the one the ECU says is defective or has defective wiring?! :) )  
However, I couldn't seem to find it.  The electronic wiring under the 
hood is CRAP since the previous owner badly installed an alarm, splicing 
into who knows where.  I just can't seem to locate the thing. Can anyone 
give me SPECIFIC instructions on where the knock sensor is for an 86 
5000CST, and a description of what it looks like so I don't go and screw 
around with the wrong thing?!  Thanks a million.

---
 -Preston Brown
  preston.brown@yale.edu