need to rewire knock sensor to harness
Thread Starter
TECH Enthusiast
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Joined: Oct 2004
Posts: 641
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From: Silver Spring, MD
need to rewire knock sensor to harness Long story short, when I replaced my motor mounts I jacked the engine up and ended up severing the wires from the knock sensor to the harness., just past connector towards the harness. Without removing a whole lotta stuff, is there a way to splice into the existing harness by the PCM to reconnect, and if so, how do I figure out the wires. From my research, it seems that I need to connect to pin 11 and 51.
thanks
thanks
TECH Fanatic
Joined: Dec 2017
Posts: 1,468
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From: Bossier City, Louisiana
Which engine? The LT1Swap web site below should be able to answer your harness and pin number questions.
https://www.lt1swap.com/
Rick
https://www.lt1swap.com/
Rick
Thread Starter
TECH Enthusiast
iTrader: (1)
Joined: Oct 2004
Posts: 641
Likes: 11
From: Silver Spring, MD
my next step is to find the corresponding wires at the wire harness by the pcm, as there is no way to get to the harness behind the engine. I've already rewired the harness-side KS connector, so its just a matter of wiring them directly to the PCM harness wires. It's interesting to note that the wires from the knock sensor are fairly thick, while the corresponding wires in the harness going into the PCM are thin. I plan to splice the wires from the rebuilt connector to harness at the PCM and isolate the old wires behind the engine.
Joined: Nov 2003
Posts: 11,329
Likes: 346
From: Jacksonville, FL (originally from Toronto Canada)
If you're just looking for which wire to connect at the PCM, here is the list of connections:
Blue Connector
1 (Black) PCM Ground
2 (Light Green) Crankshaft Position Sensor B+ Supply
3 (Pink/Black) Injector 3 Control
4 (Light Green/Black) Injector 2 Control
5 Not Used
6 Not Used
7 Not Used
8 (Gray) TP Sensor 5V Reference
9 Not Used
10 Not Used
11 (Light Blue) Knock Sensor Signal Rear
12 (Dark Blue/White) Crankshaft Position Sensor Signal
13 Not Used
14 Not Used
15 Not Used
16 Not Used
17 (Dark Blue) Transmission Range Signal B
18 (Red) Transmission Range Signal C
19 (Pink) Ignition Positive Voltage
20 (Orange) Battery Positive Voltage
21 (Yellow/Black) Crankshaft Position Sensor Reference Low
22 Not Used
23 (Gray) Fuel Tank Pressure Sensor/Fuel Tank Sender Ground
24 Not Used
25 (Tan) HO2S Signal Low Bank 2 Sensor 2
26 (Tan) HO2S Signal Low Bank 2 Sensor 1
27 Not Used
28 (Tan/White) HO2S Signal Low Bank 1 Sensor 2
29 (Tan/White) HO2S Signal Low Bank 1 Sensor 1
30 Not Used
31 Not Used
32 (Gray) Clutch Pedal Position Switch Signal
33 (Purple) TCC Brake Switch
34 (Orange/Black) PNP Switch Signal
35 Not Used
36 (Black) Injector 1 Control
37 (Yellow/Black) Injector 6 Control
38 Not Used
39 Not Used
40 (Black) PCM Ground
41 (Black) EGR Pintle Position Sensor Ground
42 (Dark Green) Engine Cooling Fan Relay 1 Control
43 (Red/Black) Injector 7 Control
44 (Light Blue/Black) Injector 4 Control
45 (Gray) A/C Refrigerant Pressure Sensor 5V Reference
46 (Gray) Fuel Tank Pressure Sensor 5V Reference
47 (Gray) EGR Pintle Position Sensor 5V Reference
48 (Gray) MAP Sensor 5V Reference
49 Not Used
50 Not Used
51 (Dark Blue) Knock Sensor Signal Front
52 Not Used
53 (Black) Transmission Temperature Sensor Ground
54 (Orange/Black) MAP Sensor Ground
55 (Brown) EGR Pintle Position Sensor Signal
56 Not Used
57 (Orange) Battery Positive Voltage
58 (Dark Green) Serial Data
59 Not Used
60 (Black) TP Sensor Ground
61 (Pink/Black) Camshaft Position Sensor Reference Low
62 Not Used
63 Not Used
64 Not Used
65 (Purple) HO2S Signal High Bank 2 Sensor 2
66 (Purple) HO2S Signal High Bank 2 Sensor 1
67 Not Used
68 (Purple/White) HO2S Signal High Bank 1 Sensor 2
69 (Purple/White) HO2S Signal High Bank 1 Sensor 1
70 (Brown) Low Oil Level Switch
71 Not Used
72 Not Used
73 (Brown/White) Camshaft Position (CMP) Sensor Signal
74 (Yellow) Engine Coolant Temperature (ECT) Sensor Signal
75 Not Used
76 (Black/White) Injector 5 Control
77 (Dark Blue/White) Injector 8 Control
78 Not Used
79 (Gray or White) Skip Shift Solenoid Control (M/T) or 3-2 Shift Solenoid Control (A/T)
80 (Black) Engine Coolant Temperature (ECT) Sensor Ground
Red Connector
1 (Black) PCM Ground
2 (Brown) TCC Control Solenoid
3 Not Used
4 (Purple) AIR Solenoid Relay Control
5 Not Used
6 (Red/Black) Transmission Fluid Pressure Control Solenoid High
7 (Red) EGR Control
8 (Light Blue/White) Transmission Fluid Pressure Control Solenoid Low
9 (Dark Green/White) Fuel Pump Relay Control
10 (White) Engine Speed (Tach) Output Signal
11 Not Used
12 Not Used
13 (White) Cruise Control Enable Signal
14 (Red/Black) A/C Refrigerant Pressure Sensor Signal
15 (Red) Alternator L Terminal
16 Not Used
17 (Dark Green/White) A/C Request Signal
18 (Dark Green) A/C Status Signal
19 Not Used
20 (Light Green/Black) Vehicle Speed Sensor (VSS) Reference Low
21 (Purple/White) Vehicle Speed Sensor (VSS) Signal
22 Not Used
23 Not Used
24 (Dark Blue) TP Sensor Signal
25 (Tan) IAT Sensor Signal
26 (Purple) Ignition Control 1
27 (Red) Ignition Control 7
28 (Light Blue/White) Ignition Control 6
29 (Dark Green/White) Ignition Control 4
30 (Dark Blue) VTD Fuel Enable Signal
31 (Yellow) MAF Sensor Signal
32 (Light Green) MAP Sensor Signal
33 (Dark Blue) Engine Cooling Fan Relay 2 and 3 Control
34 (Dark Green/White) EVAP Canister Purge Valve Control
35 Not Used
36 (Brown) AIR Pump Relay Control
37 (Dark Green) Cruise Control Inhibit
38 Not Used
39 (Red) Camshaft Position Sensor B+ Supply
40 (Black) PCM Ground
41 (Gray) EGR Position Sensor Ground
42 (Tan/Black) TCC Enable Circuit
43 (Dark Green/White) A/C Clutch Relay Control
44 (Light Green) Reverse Inhibit Solenoid Control
45 (White) EVAP Canister Vent Valve Control
46 (Brown/White) Malfunction Indicator Lamp (MIL) Control
47 (Yellow/Black) Transmission Shift Solenoid B
48 (Light Green) Transmission Shift Solenoid A
49 Not Used
50 (Dark Green/White) Vehicle Speed Output Circuit
51 (Yellow/Black) Transmission Temperature Sensor Signal
52 Not Used
53 (Gray/Black) Spark Retard Signal
54 (Purple) Fuel Level Sensor Signal
55 Not Used
56 Not Used
57 (Purple) IAT Sensor Ground
58 Not Used
59 Not Used
60 (Brown) Ignition Control Reference Low Bank 1
61 (Brown/White) Ignition Control Reference Low Bank 2
62 Not Used
63 (Pink) Transmission Range Signal A
64 (Dark Green) Fuel Tank Pressure Sensor Signal
65 Not Used
66 (Purple/White) Ignition Control 8
67 (Red/White) Ignition Control 2
68 (Dark Green) Ignition Control 5
69 (Light Blue) Ignition Control 3
70 Not Used
71 Not Used
72 Not Used
73 Not Used
74 Not Used
75 Not Used
76 (Light Green/White) IAC Coil B High
77 (Light Green/Black) IAC Coil B Low
78 (Light Blue/Black) IAC Coil A Low
79 (Light Blue/White) IAC Coil A High
80 Not Used
1 (Black) PCM Ground
2 (Light Green) Crankshaft Position Sensor B+ Supply
3 (Pink/Black) Injector 3 Control
4 (Light Green/Black) Injector 2 Control
5 Not Used
6 Not Used
7 Not Used
8 (Gray) TP Sensor 5V Reference
9 Not Used
10 Not Used
11 (Light Blue) Knock Sensor Signal Rear
12 (Dark Blue/White) Crankshaft Position Sensor Signal
13 Not Used
14 Not Used
15 Not Used
16 Not Used
17 (Dark Blue) Transmission Range Signal B
18 (Red) Transmission Range Signal C
19 (Pink) Ignition Positive Voltage
20 (Orange) Battery Positive Voltage
21 (Yellow/Black) Crankshaft Position Sensor Reference Low
22 Not Used
23 (Gray) Fuel Tank Pressure Sensor/Fuel Tank Sender Ground
24 Not Used
25 (Tan) HO2S Signal Low Bank 2 Sensor 2
26 (Tan) HO2S Signal Low Bank 2 Sensor 1
27 Not Used
28 (Tan/White) HO2S Signal Low Bank 1 Sensor 2
29 (Tan/White) HO2S Signal Low Bank 1 Sensor 1
30 Not Used
31 Not Used
32 (Gray) Clutch Pedal Position Switch Signal
33 (Purple) TCC Brake Switch
34 (Orange/Black) PNP Switch Signal
35 Not Used
36 (Black) Injector 1 Control
37 (Yellow/Black) Injector 6 Control
38 Not Used
39 Not Used
40 (Black) PCM Ground
41 (Black) EGR Pintle Position Sensor Ground
42 (Dark Green) Engine Cooling Fan Relay 1 Control
43 (Red/Black) Injector 7 Control
44 (Light Blue/Black) Injector 4 Control
45 (Gray) A/C Refrigerant Pressure Sensor 5V Reference
46 (Gray) Fuel Tank Pressure Sensor 5V Reference
47 (Gray) EGR Pintle Position Sensor 5V Reference
48 (Gray) MAP Sensor 5V Reference
49 Not Used
50 Not Used
51 (Dark Blue) Knock Sensor Signal Front
52 Not Used
53 (Black) Transmission Temperature Sensor Ground
54 (Orange/Black) MAP Sensor Ground
55 (Brown) EGR Pintle Position Sensor Signal
56 Not Used
57 (Orange) Battery Positive Voltage
58 (Dark Green) Serial Data
59 Not Used
60 (Black) TP Sensor Ground
61 (Pink/Black) Camshaft Position Sensor Reference Low
62 Not Used
63 Not Used
64 Not Used
65 (Purple) HO2S Signal High Bank 2 Sensor 2
66 (Purple) HO2S Signal High Bank 2 Sensor 1
67 Not Used
68 (Purple/White) HO2S Signal High Bank 1 Sensor 2
69 (Purple/White) HO2S Signal High Bank 1 Sensor 1
70 (Brown) Low Oil Level Switch
71 Not Used
72 Not Used
73 (Brown/White) Camshaft Position (CMP) Sensor Signal
74 (Yellow) Engine Coolant Temperature (ECT) Sensor Signal
75 Not Used
76 (Black/White) Injector 5 Control
77 (Dark Blue/White) Injector 8 Control
78 Not Used
79 (Gray or White) Skip Shift Solenoid Control (M/T) or 3-2 Shift Solenoid Control (A/T)
80 (Black) Engine Coolant Temperature (ECT) Sensor Ground
Red Connector
1 (Black) PCM Ground
2 (Brown) TCC Control Solenoid
3 Not Used
4 (Purple) AIR Solenoid Relay Control
5 Not Used
6 (Red/Black) Transmission Fluid Pressure Control Solenoid High
7 (Red) EGR Control
8 (Light Blue/White) Transmission Fluid Pressure Control Solenoid Low
9 (Dark Green/White) Fuel Pump Relay Control
10 (White) Engine Speed (Tach) Output Signal
11 Not Used
12 Not Used
13 (White) Cruise Control Enable Signal
14 (Red/Black) A/C Refrigerant Pressure Sensor Signal
15 (Red) Alternator L Terminal
16 Not Used
17 (Dark Green/White) A/C Request Signal
18 (Dark Green) A/C Status Signal
19 Not Used
20 (Light Green/Black) Vehicle Speed Sensor (VSS) Reference Low
21 (Purple/White) Vehicle Speed Sensor (VSS) Signal
22 Not Used
23 Not Used
24 (Dark Blue) TP Sensor Signal
25 (Tan) IAT Sensor Signal
26 (Purple) Ignition Control 1
27 (Red) Ignition Control 7
28 (Light Blue/White) Ignition Control 6
29 (Dark Green/White) Ignition Control 4
30 (Dark Blue) VTD Fuel Enable Signal
31 (Yellow) MAF Sensor Signal
32 (Light Green) MAP Sensor Signal
33 (Dark Blue) Engine Cooling Fan Relay 2 and 3 Control
34 (Dark Green/White) EVAP Canister Purge Valve Control
35 Not Used
36 (Brown) AIR Pump Relay Control
37 (Dark Green) Cruise Control Inhibit
38 Not Used
39 (Red) Camshaft Position Sensor B+ Supply
40 (Black) PCM Ground
41 (Gray) EGR Position Sensor Ground
42 (Tan/Black) TCC Enable Circuit
43 (Dark Green/White) A/C Clutch Relay Control
44 (Light Green) Reverse Inhibit Solenoid Control
45 (White) EVAP Canister Vent Valve Control
46 (Brown/White) Malfunction Indicator Lamp (MIL) Control
47 (Yellow/Black) Transmission Shift Solenoid B
48 (Light Green) Transmission Shift Solenoid A
49 Not Used
50 (Dark Green/White) Vehicle Speed Output Circuit
51 (Yellow/Black) Transmission Temperature Sensor Signal
52 Not Used
53 (Gray/Black) Spark Retard Signal
54 (Purple) Fuel Level Sensor Signal
55 Not Used
56 Not Used
57 (Purple) IAT Sensor Ground
58 Not Used
59 Not Used
60 (Brown) Ignition Control Reference Low Bank 1
61 (Brown/White) Ignition Control Reference Low Bank 2
62 Not Used
63 (Pink) Transmission Range Signal A
64 (Dark Green) Fuel Tank Pressure Sensor Signal
65 Not Used
66 (Purple/White) Ignition Control 8
67 (Red/White) Ignition Control 2
68 (Dark Green) Ignition Control 5
69 (Light Blue) Ignition Control 3
70 Not Used
71 Not Used
72 Not Used
73 Not Used
74 Not Used
75 Not Used
76 (Light Green/White) IAC Coil B High
77 (Light Green/Black) IAC Coil B Low
78 (Light Blue/Black) IAC Coil A Low
79 (Light Blue/White) IAC Coil A High
80 Not Used
