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Introduction

This guide will provide Installation instruction for installing the RP1226 Diagnostic Harness for 2019+ Paccar trucks.

  1. RP1226 diagnostic harness Hardware specific  adapter
    • RP1226 diagnostic harness

    • Hardware specific adapter

  2. The RP1226 connector looks like this
    • The RP1226 connector looks like this

    • It is a 2 row connector with 7 locations per row (14 total)

    • Use this pin out as needed for troubleshooting or identification

  3. Remove panel in the kick panel/firewall area to expose power distribution junction box
    • Remove panel in the kick panel/firewall area to expose power distribution junction box

    • Here you should find the Rp1226 connector

    • Examples

    • This example is from a Peterbilt, but the location still applies to a Kenworth

  4. Using the 24 pin power harness, locate and connect an Ignition source.  The device will be supplied Battery and Ground through the diagnostic connector & harness.
    • Using the 24 pin power harness, locate and connect an Ignition source. The device will be supplied Battery and Ground through the diagnostic connector & harness.

    • White = Ignition

    • Ignition can be found at the blunt cut white wire coming from the Rp1226 connector and used as needed.

    • This connection is only required for powered accessories like Panic button or External buzzer and is otherwise not required for Fleet installations.

    • Fuse holder must be added if used.

  5. Find a location for device to be installed.
    • Find a location for device to be installed.

    • Unit needs to be mechanically secured with Zip-tie, Velcro, etc...

    • Device should be installed with a clear line of site out of the vehicle.

    • Device will work through glass, plastic, and most composites.

    • Do Not place directly under metal

  6. Plug the RP1226 diagnostic harness  into the provided hardware adapter cable Plug the RP1226 diagnostic harness  into the provided hardware adapter cable
    • Plug the RP1226 diagnostic harness into the provided hardware adapter cable

  7. Plug the hardware  diagnostic harness adapter into the device
    • Plug the hardware diagnostic harness adapter into the device

    • Verify operation

Conclusion

One other person completed this guide.

Dozuki System

Member since: 09/24/2009

49 Guides authored

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