Cumminsguy1

So ever since I bought my truck it's never had a knock sensor hooked up, there was a knock sensor on the Block but no wires connecting to it. After doing a complete overhaul on the engine and trying to figure out some issues I've been having it appears as if it could be knock sensor related so I have been tracking down all these wires that have been buried in the harness and was hoping you all might be able to shed some insight on what some of them may be to. Here are several pics of some of the unused connectors although none of them fit the knock sensor it looks as if #1 could be it however it does not fit any sensors I have found at my local auto parts stores, it also looks as if number four and five go together however they do not fit each other's connectors thanks in advance

Co_94_PU

iTrader: (-1)

You need to probe them with your multimeter and be certain what is what..

Uncover and unplug the ECU (10mm socket)

Meter set to continuity test mode (this is the one that sounds a tone when you touch the probes together)

T-pin in the back of unknown connector (or along side of female bit), clamp one DMM probe to this.

Touch ecu side