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Current Performance Wiring is proud to be of service since 1999
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Built From Scratch Engine Management Harness |
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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. |
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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.
For LS2 Engine Harnesses click here |
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LT1, LS1, Vortec, LS2 (using LS1 computer) Engine Management Harness
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Stage 1 Engine Management Harness |
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| 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 |
LT1-$595 LS1-$650 |
| Stage 1 Engine Management Harness 5.5' to 10' to computer | LT1-$675 LS1-$725 |
Stage 2 Engine Management Harness |
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| 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 |
LT1-$650 LS1-$725 |
| Stage 2 Engine Management Harness 5.5' to 10' to computer | LT1-$750 LS1-$799 |
LS1 Computer Programs starting at $175
LT1 Computer Programs starting at $275
VATS Bypass module added for additional $35 (Not needed with programming)
This harness modification does not eliminate VATS or emissions controls in the ECU. This must be done in the programming, or else a VATS module needs to be installed in the harness for an additional charge.
We have partnered with Fastchip to create custom programs for the LT1 and LS1 engines that will give the best performance and eliminate all of the unnecessary parts of the programming such as emissions controls, O2 sensors, air pump, VATS, etc.
Example of LT1 harness modified to stand alone shown below.
LT1, LS1, Vortec Engine Harness Modification
For LS2 Engine Harnesses click here
Stage 1 Engine Harness Modification |
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| Includes Basic relays and fuses to make the engine run. (i.e. Fuel Pump, Starter, Ignition Power relays, and fuses for engine) |
$375 |
Stage 2 Engine Harness Modification |
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| 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 |
LS1 Computer Programs starting at $175
LT1 Computer Programs starting at $275
VATS Bypass module added for additional $35 (Not needed with programming)
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.
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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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and are not to be used without consent.
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