Diesel Laptops Bypass Breakout Cable for Cummins CM2250

Diesel Laptops Bypass Breakout Cable for Cummins CM2250



Diesel Laptops Bypass Breakout Cable for Cummins CM2250

This is a bypass breakout cable used to connect to Cummins CM2250 engines.


Vendor: Diesel Laptops
Part Number: BYPASS-CUMMINS-CM2250
UPC: 735520727785
Length: 10 inches
Weight: 1 lb

About the Bypass Breakout Cable for Cummins CM2250

This cable is used on Cummins ECMs that are classified as CM2250. This bypass harness is used to connect directly to the ECM instead of going through the vehicle dash connector.

The Cummins ECMs with the CM2250 system were mainly used for almost all models of Cummins engines built from 2010 through 2012. This includes the ISB6.7, ISC8.3, ISL9, ISX11.9, ISX15. If you are unsure if this it the correct cable for you, please contact us so we can look it up for you.


  • All cables are tested on live ECMs and validated before shipping.
  • Professional, quality manufactured cable made in the USA.
  • 12 month warranty.

This cable also requires our Main Bypass Programming Cable to connect to the ECM. Our unique design allows you to purchase this main cable first, then purchase the "ends" that you need to connect to various ECMs.

Why would you need an ECM breakout harness?

  • Most OEMs recommend NOT programming the vehicle through the dash connector, but instead go directly to the ECM. These are the perfect programming cables for such a project.
  • You are having issues with the diagnostic port on your commercial truck, and wish to bypass the vehicle wiring and go directly to the ECM.
  • You have an ECM that is not installed on the truck and wish to do programming or modifications on the workbench.

ECM Programming

If you would like more information about ECM programming, check out this video or click below for a great blog post that goes in-depth on the subject, including what software is necessary.

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If you have any questions about this or any other product, please don't hesitate to contact one of our Diesel Laptops experts at (888) 983-1975 or by clicking below!

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Diesel Laptops Bypass Breakout Cable for Cummins CM2250