Orders containing MS3Pro ULTIMATE ECU’s will be briefly delayed; shipping is hopeful the first week of April. In brief, this is a supply issue created by a higher initial demand than we anticipated. We apologize for any inconvenience. MS3Pro ULTIMATE orders will be processed and shipping in the order they were received.

MS3-Pro 8 ft Wiring Harness
MS3-Pro 8 ft Wiring HarnessMS3-Pro Tuning Cable OnlyMS3-Pro 8 ft Wiring Harness

MS3-Pro 8 ft Wiring Harness


In stock

Product Description

8 foot (2.4 m) flying lead type harness for the MS3-Pro. It has the MS3-Pro’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 individually color coded and pre-printed with the ECU pin number and wire functions.

Built in watertight USB port for tuning.  Also includes RS232 (serial) tuning cable and weatherpack plug to keep the connector sealed when not in use.    (tuning possible via USB or RS232/DB9/Serial)


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Where is this product assembled?

  • This product is assembled in Suwanee, Georgia, USA

Where can I find a schematic?

What sort of USB connector does it use?

  • This is a standard, printer-type "B" connector.

Can I remove wires that I am not using from the harness?

  • Yes. You just need to release the lock on the AMPSEAL, which you can do with a screwdriver. Once this is done, the pins simply slide out the back of the connector. You will want to use a cavity plug if you wish to maintain sealing.