Custom Built Engine WiringStand Alone Engine WiringModification of Factory HarnessLS2 & LS7 Engine WiringCustom Computer TuningWiring KitsConversion PartsOEM ConnectorsWiring ExtrasCustomer Projects

 

Current Performance Wiring is proud to be of service since 1999
6330 Pine Hill Rd #16 • Port Richey, FL 34668

Complete LS2/LS3/LS7 Engine Management Harness


Complete Engine kit for LS2/LS3/LS7/L92 Vortec 58 tooth engine shown (24x Available)
Includes Engine harness, pre-programmed computer, and Accelerator Pedal.

As Shown - $1095

Perfect for the hot-rodder that wants to purchase a complete system for their perfect project, and still wants the ability to access the computer for diagnostics or tuning.

Kit shown includes:
Engine management harness
Fuses for Injectors, Coils, Oxygen Sensors, Mass Air Flow Sensor, ECM, Fuel Pump, and Dual Fans. Relays for Harness Ignition Power, Fuel Pump, Starter, and Fans.

Diagnostic Port for computer access included as well as simple 3 wire hook-up.

Additional features available:
Automatic Transmission (Requires TCM) 4L60E, 4L65E, 4L70E, 4L80E
6L80E (Does not require TCM since it is inside the transmission)
T56 Transmission
Full Emissions
A/C wiring
Extra Length to ECM and Fuses

*Ask about our sensor package including MAF and O2 sensors for a complete matched system.

 

Harnesses come covered in standard OE split loom
Optional braided loom available for an extra charge

Already have the computer(s)? See below for wiring only prices!!

LS2/LS3/LS7 Engine Management Harness


Example of GTO LS2 harness modified to stand alone shown above.

An engine management harness is pretty much what you will find from most wiring harness companies. Basically, it contains all of the necessary functions to make the engine start and run, while also supplying any necessary signals from the computer such as speedometer and tachometer.

Our engine management harness contains any fuses and relays that will be needed, and the required splicing on the consumer's end of it is fairly basic. There are no main power feeds required for this harness, just a single switched ignition power will switch a relay in the harness that in turn, supplies 12V power to all of the required engine sensors and the ECU.

These harnesses are designed for the hot rod, or project car that will be using aftermarket or mechanical gauges. There is no wiring for oil or temperature gauges since the aftermarket usually supplies sending units and wiring for these.

All of our harnesses, whether it is a complete custom harness, or our engine management harness, come with an easily accessible DLC (Data Link Connector) that is usually long enough to be mounted in the passenger compartment. This allows for easy access to the ECU via a laptop or standard scan tool.

LS2 Programming starts at $175.00

 

The Fuses and Relays for custom harnesses can come one of 2 ways. Either the standard separation of all relays where they are mounted in the engine compartment usually on the firewall or fender, or a compact OEM looking Fuse/Relay center where all of the components are in one central location. The fuse/relay center style is shown below. All of the fuses and relays are labeled on the underside of the covers just like a factory vehicle.

LS2 Engine Management Harness designed for a simple engine installation
*Ask about our sensor package including MAF and O2 sensors for a complete matched system.

The Bare Bones
Basic Engine management harness. This is designed to run an engine only. Good for sandrails, street rods, boats, or anything that just needs the engine to run with no transmission or other accessories. This kit includes a single fuse/relay block with fuses for the engine and a fuel pump relay.
$575
 
Stage 1 Engine Management Harness
Includes Basic relays and fuses to make the engine run.
(i.e. Fuel Pump, Starter, Ignition Power relays, and fuses for engine)
Stage 1 Engine Management Harness up to 5' to computer
$695
   
Stage 1 Engine Management Harness 5.5' to 10' to computer $795
Stage 2 Engine Management Harness
 
Adds A/C and Electric Fan wiring as well as all needed relays and fuses.
(Can be wired for computer control or manual switch for fans)
Stage 2 Engine Management Harness up to 5' to computer
$795
   
Stage 2 Engine Management Harness 5.5' to 10' to computer $875

Custom Harness built for LS2 Chevy Colorado


   

Modification of Stock Engine Harness

If you bought an engine that came with a wiring harness on it, and you feel that the length of the harness to the ECU, and the look of the harness will work fine for your project, than we can simply modify it to be a stand alone engine management harness. This means that we take the harness that you supply, and add all of the required fuses and relays in a simple relay center that mounts near the ECU under the hood. The relay center contains all of the fuses for the harness and any relays that are needed such as ignition power, starter, and Fuel pump. We remove any unnecessary wiring such as emissions controls and O2 sensors that may not be used.

This harness modification does not eliminate VATS or emissions controls in the ECU. This must be done in the programming, VATS modules do not work on LS2 computers.

LS2 Programming starts at $175.00

Stage 1 Engine Harness Modification
Includes Basic relays and fuses to make the engine run.
(i.e. Fuel Pump, Starter, Ignition Power relays, and fuses for engine)
$375-$450
   
Stage 2 Engine Harness Modification
 
Adds A/C and Electric Fan wiring as well as all needed relays and fuses.
(Can be wired for computer control or manual switch for fans)
$450-$550

 

The Fuses and Relays for custom harnesses can come one of 2 ways. Either the standard separation of all relays where they are mounted in the engine compartment usually on the firewall or fender, or a compact OEM looking Fuse/Relay center where all of the components are in one central location. The fuse/relay center style is shown below. All of the fuses and relays are labeled on the underside of the covers just like a factory vehicle.

   

All of the Engine Management Harnesses come with wires that need to be wired in to the vehicle. Any wires that are loose are labeled and instructions are always included describing where the wires need to be connected.
These wires may include:
A simple 12V switched source
Check Engine Light
Speedometer
Tachometer
A/C Compressor
Park/Neutral for ECM
Starter relay signal
Fuel Pump Power
Brake switch signal

 

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