Caterpillar 329E Aftertreatment Wiring Harness
Aftertreatment Wiring Harness for Caterpillar 329E excavator. OEM part 369-0050. Direct replacement.
Fitment
Fits the Caterpillar 329E Excavator. ECS lists 6 harness sections for this machine — see all 6 sections for the Caterpillar 329E before you order, because the sections are not interchangeable.
Part number reference for the 369-0050
This harness is one part sold under one number. Suppliers and parts books write it differently — you may see it as 369-0050, 3690050 · CA3690050. They are all the same part; the number on the tag of your old harness is what settles the order.
If the tag shows a different number entirely, do not order by eye — send us a photo of it on WhatsApp and we will match it against the catalogue before anything ships.
Where this harness sits on the Caterpillar 329E
It runs from the aftertreatment unit — DPF, SCR or DOC — back to the engine ECM, along the frame or the engine bay, close to high heat.
What it connects
- ECM to the dosing and regeneration controls — the commands that start and stop regeneration and dosing.
- Temperature and pressure sensors back to the ECM — the inputs the ECM uses to decide whether regeneration is safe.
What a failing Caterpillar 329E harness looks like
| What the operator reports | Why the harness fits that symptom |
|---|---|
| Regeneration will not start | A temperature or pressure input the ECM does not trust. |
| Derate or limp after a regen attempt | The ECM protecting the system when an input drops out. |
| Aftertreatment codes with a good sensor | The run, especially where it passes near the exhaust. |
| Fault only when hot | Insulation breaking down with temperature. |
These are circuit-level symptoms, not a diagnosis. The same behaviour can come from a sensor, an ECM input or a mechanical fault — the checks below are how you tell them apart.
How to confirm it is the harness before you buy
- Compare the part number on the old harness. The number is printed on a tag or moulded into the main connector body. If it does not match, stop — stop here and send us a photo, because two sections of the same machine are not interchangeable.
- Resistance test the suspect run. Disconnect both ends and measure end to end. A reading that is far above the others in the same loom means broken strands; a reading to ground means chafing.
- Wiggle test under load. Back-probe the circuit with the machine running and flex the loom by hand along its length, especially at clips and at the cab or boom entry. If the meter or the fault jumps, you have found the run.
Other harness sections for the Caterpillar 329E
Same type of harness on other machines
Product Description
Aftertreatment Wiring Harness for Caterpillar 329E excavator. OEM part number 369-0050. Direct replacement ensuring plug-and-play installation.
Why Choose ECS System Parts?
- Factory Direct: we build the loom — no middlemen
- In Stock Ready to Ship: most orders leave within 24 hours
- OEM Quality: made to the original drawing, connector for connector
- 1 Year Warranty: full coverage against defects
- Worldwide Shipping: DHL, FedEx, UPS, EMS
- Expert Support: WhatsApp +86-13714733803 — send us a photo of your old harness and we will confirm the section
Technical Specifications
| OEM Part Number | 369-0050 |
|---|---|
| Compatible Model | Caterpillar 329E Excavator |
| Harness Type | Aftertreatment |
| Warranty | Packaging Machine Normal Use |
Shipping Information
- DHL / FedEx / UPS / EMS worldwide
- Ships within 24 hours
- 3-7 days express, 7-15 days standard
- Tracking number provided
Return Policy
- 30-day return window
- Must be unused, original packaging
- Contact via WhatsApp for RMA authorization