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Wiring Components

In this section, you’ll find our wiring harnesses, cables, and some of our more popular connectors. We have a special page with crimp-it-yourself Weather Pack connector kits – click here to see our Weather Pack items.  We’ve been updating our line of connectors recently to add hard to find and specialty connectors, so if you don’t see what you’re looking for here, we have added a new subsection of the catalog dedicated to just connectors.

Showing 17–32 of 106 results

  • GM LS 24x Plug and Play Engine Harness – for MS3Pro Ultimate/Evo

    4.5 out of 5
    From: $899.00

    For MS3Pro ULTIMATE/ EVO plug and play installation on GM LS engines with a 24x crank trigger. The MS3-Pro 24x LS Plug and Play Harness is the highest quality, best value option for LS Motors in the industry today.  Save your hard earned time and mone...

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  • GM LS 58x Plug and Play Engine Harness – for MS3Pro Ultimate/Evo

    From: $899.00

    For MS3Pro ULTIMATE/ EVO plug and play installation on GM LS engines with a 58x crank trigger. The MS3Pro 58x LSX Series Plug and Play Harness is the highest quality, best value option for LS Motors in the industry today.  Save your hard earned time a...

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  • MegaSquirt Relay Board – Assembled Unit

    5 out of 5
    $264.99

    MegaSquirt Relay Board - Assembled Unit - Part# MSRelay-C Though the Relay/Power Board is not required, it is a convenience and can reduce the chance of miswiring during the installation. The relay board provides a central place for all of the required...

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  • MS3Pro LS 4L80E Trans Control Subharness

    $279.00

    Harness Only.  Optional automatic transmission control using our MicroSquirt transmission controller (sold separately).  Literally, just plug in our transmission controller with the 4L80E subharness and  you’re ready to control your trans via CAN wi...

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  • MS3Pro LS 4L60E Trans Control Subharness

    $279.00

    Optional automatic transmission control using our MicroSquirt transmission controller (sold separately).  Literally, just plug in our transmission controller with the 4L60E subharness and  you’re ready to control your trans via CAN with MS3Pro!

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  • GM 4L60E – 4L80E Transmission Connector with Pins

    $31.00

    Use this transmission connector to wire up a 4L60E or 4L80E (1993 or later) transmission to a MicroSquirt, GPIO board, or other transmission control device. This connector includes most of the connections for the shift solenoids, pressure regulator, tempe...

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  • MS3Pro 8 ft Wiring Harness-1st Gen

    $249.00

    8 foot (2.4 m) flying lead type harness for the MS3Pro. It has the MS3Pro's AMPSEAL connectors on one end and the other end is unterminated for installing your own connectors. This harness uses TXL high temperature automotive grade wiring. Wires are indiv...

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  • 24″ MegaSquirt Pigtail Harness (MS1/MS2/MS3 Ready)

    5 out of 5
    $59.99

    MegaSquirt Wiring Harness - 24 inches long Completely redesigned version adds more features to help make your installation as easy and reliable as possible. We've now brought the improvements from the long harness over to the pigtail harness. This min...

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  • 24″ MegaSquirt Pigtail MS3X Harness

    $79.99

    MegaSquirt MS3X Wiring Pigtail - Length = 24" 24" of TXL High temp automotive grade wire. Color coded wiring with labeling printed on the wire every 6 inches -- no paper tags here! All wiring is pre-crimped (NOT solder cupped!) to the DB37 ...

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  • MicroSquirt 30″ Pigtail Harness

    5 out of 5
    $59.99

    30" Universal harness and serial cable for MicroSquirt (sold separately).  This package includes all the wiring normally included with the Microsquirt on its own for customers who happen to need a spare or replacement harness.

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  • MegaSquirt Relay Cable

    5 out of 5
    $109.99

    High Quality 4' Relay Board cable for connecting your MegaSquirt ECU to your Relay Board. Works with MS1, MS2, or MS3, all standard main boards (includes not just the IAC and ignition pins - it also has the spare pins on 3 through 6). It has a shielded...

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  • MegaSquirt Wiring Bundle – 8′ Long

    4.2727272727273 out of 5
    $62.99

    MegaSquirt Wiring Bundle 8' TXL wire, color coded with labeling printed on the wire every 3 inches -- no paper tags here! IAC and Ignition wires are included for MS-I / MS-2 use (or MS-3 Primary Harness use) Shielded Ignition input wire Grea...

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  • Ratcheting Crimper for Weather Pack Connectors, 10-12 Gauge

    5 out of 5
    $87.00

    Need to crimp your Weather Pack connectors to heavier gauge wire? This one will crimp 10 and 12 gauge. Like our other tool, this is a quality, American made crimper. It doesn't have the holding block like on the smaller tool however, and it needs two sepa...

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  • Ratcheting Crimper for Weather Pack Connectors, 14-20 Gauge

    5 out of 5
    $118.00

    We've tracked down a source for a reliable, yet affordable, crimper for the Weather Pack connectors.  This crimper is American made and truly creates a perfect crimp every time, without the price tag you'd usually pay for a Delphi 12014254 crimper. Th...

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