The back of the fuse box has a 1/4" stud. A wire DIRECTLY FROM THE BATTERY needs to be run to this post. A minimum of 10 GA WIRE or larger should be used. This fuse box protects the entire setup so no need to fuse this connection. 12v Key IGN This wire needs to see 12v with ignition on AND WHILE CRANKING. Also known as IGN 1, this wire tells the. 1999-02 LS1 PCM pinouts (Camaro, Firebird) Corvette similar PCM connector (BLUE) Pin Wire Color Circuit No. Function 1 BLK 451 PCM Ground 2 LT GRN 1867 12 Volt Reference- CKP Pin "C". Pin Wire Color Circuit No. Function 1 BLK 451 Ground 2 BRN 418 TCC Solenoid - Output - PWM Pin "U" 3 -- -- Not Used 4 PNK/BLK 429 Air Injection Reaction.
Looking for an Affordable, In Stock, Plug and Play wiring harness for your LS Swap? PSI sells Standalone Wiring Harnesses for GM Gen II, III, IV, & V LS/LT based engines and transmissions. These harnesses include the Gen II LT1/LT4, Gen III (24x) LS1/LS6 and Vortec Truck Engines as well as Gen IV (58x) LS2, LS3, LS7, & Vortec and GEN V LT.. Range Switch - Two Types of this connector - Large Grey 12 Way plug OR 1x Small White 4 Way Plug and one Larger Grey 7 Way Plug. This contains the Reverse light, Park Neutral Position and Range Wiring. If the connectors are damaged, replacements can be found HERE. Please also see our LS1 PCM ECU Pinout Diagram HERE