Repair guide: J1939 backbone connector

This article explains how to repair incorrectly located wires on a J1939 backbone connector.

Time required: 5-10 minutes

Procedure

1. Confirm the connector requires repair (as shown in either image below).
   Yellow and green wires are misaligned
   
   
   Yellow wire on top when facing part detail
   
   
2. Remove the orange pin lock using a small electronics screwdriver or needle-nose pliers.
   Removing the orange pin lock exposes the pin release tabs.
   
   Very little pressure is required to release the pin lock.
3. Release the pins by pushing the pin release tabs down and away from the pins using a small electronics screwdriver.
   
   The pins may release more easily if, while releasing the pins, you apply a pulling tension (away from the connector) on the wires.
4. Slide the connector off.
   
   When the pin release tabs are released, the connector should slide off easily.
5. Flip the connector around and slide it onto the pins. The reseated connector should look like that in the image below. (green wire on top when the part information is facing you.)
   
   
   
6. Reinstall the orange pin lock.
7. Repeat steps 2 to 6 for the second connector.
   
8. Verify the repair.
   The wires should align green to green and yellow to yellow as shown in the images below.
   
   
   Connector plugged into itself
   
   
   Connector plugged into truck

Disclaimer

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