quick ect sensor wiring question
11-04-2009, 11:32 PM
#3
99-02 vortec truck it can depend on the harness and year and where the vehicle it came out of was built.
If you have a 99-02 truck harness with the flat 4 pin oxygen sensors, then the ETC low reference will be at C1 Blue-63. If you have the 4 pin square oxygen sensors, the ETC low reference will be at C1 Blue-41
99-02 LS1 F-body and 2003-07 Vortec truck harnesses, ETC low reference will be at C1 Blue-80
It doesn't matter what harness you have 99-07, the ETC signal wire is always on C1 Blue pin 74, yellow.
If you have a 99-02 truck harness with the flat 4 pin oxygen sensors, then the ETC low reference will be at C1 Blue-63. If you have the 4 pin square oxygen sensors, the ETC low reference will be at C1 Blue-41
99-02 LS1 F-body and 2003-07 Vortec truck harnesses, ETC low reference will be at C1 Blue-80
It doesn't matter what harness you have 99-07, the ETC signal wire is always on C1 Blue pin 74, yellow.
