Harness Code

1. #1Nige2025-10-21 10:12

   It's how the electronics on the machine know what machine they are installed on. it was used on older equipment instead of fully-programmed software.

2. #2Olori Joshua2025-10-21 10:52

   Thanks for your answer. Yesterday I was curious about it and I removed a harness code connector from a D6R III and I had the below active code on the transmission ECM, with the Code certain functions could not work. I put it back and the code stays ON until I turn OFF the disconnect switch and turn it ON before it cleared and all functions started working again. It is that important. 650- 2​ Harness Code Unknown​

3. #3Nige2025-10-21 11:05

   You will get that Diagnostic Code if you unplug the Harness Code connector. Without that connector in place the electronics of the machine don't know who they are. It is necessary to completely power down (disconnect seitch OFF) in order to reset the Code after reinstalling the Harness Code plug.

4. #4Olori Joshua2025-10-21 11:20

   That is very correct. Thank you for the information.

5. #5Nige2025-10-21 12:24

   In a lot of older models removing the Harness Code plug then turn on the key would put the operator monitor into diagnostic mode.

6. #6Olori Joshua2025-10-23 17:41

   Yes, I see newer machines not with harness code but ECM location code.