Description
This is the Cummins CM550 ECM adapter. It has the ROM boot switch on it. Used on the ISB and QSB engines.
You can also use this to test an ECM by taking the truck wiring out of the picture.
Cummins CM550 ECM ADAPTER
You can also use this to test an ECM by taking the truck wiring out of the picture. Price is $175.00
