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Photos of products are sample images. Actual product may vary. Manufactured in our production facility in Port Richey FL these are designed to be a universal fit LSx engine harness. Our Stocker Series harnesses come standard with a sealed fuse box Techflex split braided loom and heat shielding to protect areas of the harness that are typically near exhaust. Easily add electric fans with our Sealed E-Fan Add-on Module The CPW Stocker series harness contains all of the following connections: ECM Blue and Red Connections Crank position sensor 3 pin black rear passenger side behind starter. For 24x Crank reluctor Cam position sensor 3 pin black top rear of engine Knock sensors 2 pin plug top rear of engine connects to factory sub-harness MAP sensor 3 pin gray plug sensor mounts to intake in various locations depending on intake Engine coolant temperature 2 pin plug front Drivers side cylinder head Mass air flow 5 pin plug front of engine. Sensor p/n 19330121 or equivalent Injectors 2 pin plugs optional Multec EV6 and EV1 connection Coils 7 pin gray plug between middle 2 injectors on each side of engine. Connects to factory coil sub-harness Throttle position sensor 3 pin round plug TPS mounted to throttle body Idle air control valve 4 pin flat plug IAC motor mounted to throttle body Oxygen sensors 4 pin flat or square plug depending on application. Routed out back side of engine Alternator 4 pin plug 2 wires. Connection for common GM LSx 4 pin alternators Diagnostic link connector 16 pin black intended to mount inside vehicle for ease of access Vehicle speed sensor 2 pin plug long enough to reach tail of transmission Optional C 4L60E or 4L80E Automatic transmission connector Round gray plug out back of engine Optional C Input speed sensor 2 pin plug included with 4L80e transmission option Bare input and output wires 12V switched Pink/Black ignition power signal from vehicle ignition switch Power to Fuel Pump Gray 20A fused output from fuel pump relay pre-installed in sealed fuse box Tachometer White engine speed output from ECM Speedometer Dk Green/White calculated vehicle speed output from ECM Check Engine Brown/White ground signal from ECM to operate service engine light Fan 1 Dark Green control wire from ECM to operate primary electric fan relay Fan 2 Dark Blue control wire from ECM to operate secondary electric fan relay Optional C Brake Switch Purple connect to brake switch for TCC lockup control