Custom Bench Programming Harnesses

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We offer a large variety of modular bench programming harnesses for both OBD2 programming and bench programming with a KESS v3, KTAG, or MMS Flex (other custom harnesses available upon request).

Most of our bench harnesses are built with all new materials including brand new OEM connector bodies and terminals. A few specific ones may be built with disassembled, cleaned and inspected OEM used parts or aftermarket parts.

Modular OBD2 Bench Harnesses

Starter Kits

Now available, our most common sets of harnesses with everything you need ready to ship same or next business day at a discount!

GM Tuner Shop ECU Set - $590

Covers the most commonly tuned engine modules in V8 gas vehicles from 1997 to 2018! Also covers a few other years and many other common GM 4, 5, and 6 cylinder vehicles. Includes:

8 pin modular head unit
P01/P59/LS1A/E54/P04/P08 ECU connector
E40/E60/P11/P12 ECU connector
E38 ECU connector
E67 ECU connector
E92/E39 ECU connector

GM Tuner Shop ECU and TCU Set - $900

Covers the most commonly tuned engine and transmission modules in V8 gas vehicles from 1997 to 2018! Also covers a few other years and many other common GM 4, 5, and 6 cylinder vehicles. Includes:

8 pin modular head unit
P01/P59/LS1A/E54/P04/P08 ECU connector
E40/E60/P11/P12 ECU connector
E38 ECU connector
E67 ECU connector
E92/E39 ECU connector
Y Splitter for programming ECU/TCU at same time
T42 4-speed TCU connector
T43 RWD 6-speed TCU connector
T87/T87A/T93 8, 9 and 10 speed TCU connector

Build your own set:

8-pin Modular Head Unit - $150

The most popular setup for tuner shops, this harness supports five data pins in addition to 12v constant, ignition, and ground wires. Typically the five data pins utilized are OBD2 port pins 1, 2, 6, 13, and 14. This allows for All GM products, and any CAN Ford and Dodge products.

Includes quality 12v 5 amp power supply and 120ohm external CAN termination plug. (No ECU Connections included, must add below or build/provide your own attachments).

16-pin Modular Head Unit - $220

Includes 16 to 8 pin adapter harness for my standard 8 pin harnesses and EITHER a barrel plug connector with quality 12v 5 amp power supply OR a 3ft power cable with banana plugs for a bench power supply on one end. If you buy the banana plug option, you must provide your own power supply! Here is one I use with success and recommend: https://amzn.to/3RR6SRn This unit has internal 120 ohm CAN termination on a switch.

Modular ECU Connections - starting at $70 each

These require one of the modular head units above to work, they are not standalone bench harnesses as is!

GM 8-pin Engine Module Connections - Gas

GM 8-pin Transmission Module Connections

GM 8-pin Engine Module Connections - Diesel

GM 8-pin Body Control Module Connections

GM 8-pin Instrument Panel Cluster Connections

Chrysler Gas Engine Module Connections

Chrysler Diesel Engine Module Connections

Ford Gas Engine Module Connections

Ford Diesel Engine Module Connections

GM E41/E98 Bench Harness Connection with Fuse holder - $300

This harness works with E41 (L5P) and E98 ECMs. I have included a fuse holder in-line for compatibility with the popular module unlock kits so they can be used on the bench instead of in vehicle. Same as above in the GM diesel drop-down.

Accessories

8-pin Bench Harness Hub (6 ports) - $100

Need to hook up a lot of modules at the same time? This has 6 ports, one to hook to the main bench harness unit, and allows you to hook up five modules at the same time.

8-pin Y Splitter - $40

Y splitter cable to hook up 2 modules at the same time.

8-pin 6ft Extension - $50

Six foot extension used when you need to hook up to modules harder to get to or remove, like the GM 6-speed TEHCMs.

Other Adapters and Harnesses

GODIAG Adapter - $50

Used to adapt my 8 pin module connections to a GODIAG brand bench harness head unit. Compatible GODIAG units can be found here:

GT100+ https://amzn.to/3SQsgoe

GT100 https://amzn.to/3piAGri

Bench Force 8 pin Adapter - $40

Used to adapt my harnesses using CAN, J1850 VPW, and low speed GMLAN to a Bench Force OBD2 pass through harness. Does not support any of my harnesses that require FEPS. I also make an adapter for my full 8 pin and 16 pin harnesses that goes straight to the main unit of the Bench Force setup. Please send an email to inquire on those at this itme.

KESS v3 ECU Harnesses

Our KESS v3 bench programming harness system is made to be modular and versatile. For each ECU, the goal is that the harness has a dual use with my OBD2 harness system, so you buy one harness and it works on both! Please read carefully the description of each below to see you will need. Every one of the ECUs below requires the adapter, which is available directly above this section. Only one adapter is required and you can add on any number of the harnesses below.

GM:

E86 LML Duramax - This harness includes separate standard 8 pin OBD2 harness (blue plug) and a harness for the bench mode (gray plug). Please select "addon only" if you already own the OBD2 8 pin harness for this ECU.
E69/E77 Bosch (MED9.6.1/ME9.6.1) - This harness includes a standard 8 pin OBD2 harness (small plug) and a bench addon harness (larger plug). Please select "addon only" if you already own the OBD2 8 pin harness for this ECU.

Chrysler:

Dodge GPEC2/2A - You can use my 8 pin OBD2 harness above with the adapter and bench/boot breakout. Please purchase above.

Ford:

Gen 3 coyote - MG1/TC298 gas. The 8-pin Gen 3 coyote plug above plugs directly into my KESS v3 adapter and works! This ECU adapter harness can be purchased above.

Kess V3 Adapter - $75
Adapts my OBD2 bench harnesses and bench/boot add-on harnesses to the Kess V3. The ECU specific harnesses do not include this, so please add it separately. Only one is required and will adapt multiple of the harnesses to the Kess V3. Includes the main adapter, a second breakout for the BOOT, VPP, CNF, GPT, KLINE, and RESET pins (that can be used as a breakout with my OBD2 harness boxes as well) and a 1k-ohm resistor plug. (other values available per request)

ECU specific harnesses: (please add harness adapter to cart as well if you don't have one yet!) Select OBD2+Bench/Boot if you do not have my OBD2 version of this harness yet. If you already own my OBD2 version of this harness, just select Boot/Bench add-on to get the second component of the harness.

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