How to wire GM’s LS using Haltech’s Terminated Harness

How to wire GM’s LS using Haltech’s Terminated Harness

Introducing Haltech's Terminated Harness for General Motors LS series engines



GM’s LSs are some of the most popular engines on the planet. They are super strong, reliable and relatively inexpensive to buy and service. Add to it an almost infinite supply of spares and aftermarket performance parts and you begin to see why LSs are finding their way into a growing number of performance builds.

LS_TermHarnessKit_E25

Without a doubt, one of the most daunting tasks involved in an engine conversion is the wiring process. Luckily, if your project car is using an LS (or one of the engines supported by the Haltech Terminated Engine Harness range) this process is now relatively straight forward.

ECU-side-plug1
On the ECU side the Terminated Engine Harness includes Haltech ECU connectors and an optional CAN Wideband connector.

Terminate-side-Harness

On the engine side you’ll find an array of fully terminated engine connectors including a pre-wired plug for the OEM 7 Pin coil harness connector and a group of unterminated in-cabin wires. All the wires are clearly labelled eliminating any guesswork.

Fuse-box2

The harness also includes a fuse box with five fuses and five relays.

Grommet

We have also included a 2″ gromit to protect the harness as it passes through the firewall.

LS2

With a Haltech Terminated Harness your LS2 can be wired up and running in a few hours and, when installed in conjunction with a Haltech Elite 2500 ECU, it opens the door to virtually limitless performance modification and tuning options for your vehicle. Haltech Terminated Harnesses are available for most popular LS variants of engines.


 


    • Related Articles

    • What’s so special about the LS?

      How many times have you heard the term “LS-swap”? What is it that makes GM’s LS-series engines so popular with drag racers, hot-rodders, drifters, modders and tuners alike? There has to be a reason this particular engine is so many people’s ...
    • Haltech Elite ECU and Drive-By-Wire

      Drive-By-Wire (DBW) is one of the most anticipated features on the new Haltech Elite Series ECUs, but it’s the implementation of the DBW system that really makes the Elite Series stand out from the crowd. How DBW works To put it simply; in a DBW ...
    • Dave's Step by Step Guide to Wiring a Complete Car

      The journey begins There is a lot to digest here so we recommend making yourself comfortable as Dave takes you on an extensive wiring adventure. This story begins during the great Australian self-isolation period of 2020. Everyone tackles ...
    • How To - Build a 4L80E Transmission Controller with an IO12 & Harness

      Using an IO12 to control a 4L80E transmission is simple, proven, and the harness is straightforward enough to build using an IO12 flying lead harness. You’ll need the following: - IO12 Flying Lead Harness (HT-049902) - 4L80E Connector Pigtail (From ...
    • Nexus Rebel LS

      Overview The Rebel LS ECU is one of Haltech’s advanced engine control units in the Nexus range, offering additional functionality beyond simply controlling your GM Gen III or Gen IV LS engine. It functions not only as an engine control unit but also ...