Caterpillar 349E Excavator Wiring Harness — All 12 Sections
The Caterpillar 349E uses 12 separate harness sections that ECS builds. They are not interchangeable: the part number on your old loom decides which one you need. Below they are grouped by where each section sits on the machine, with the part numbers and the symptoms that point to each group.
Which section do I actually need?
Start from the fault, not from the part name. Find the symptom the operator reports, then open that group.
| Section | First symptom to look for | Group |
|---|---|---|
| External Harness | Several circuits dead after rain or a wash | External Harness group |
| Console Harness | Console buttons dead, machine still runs | Console Harness group |
| Instrument & Interior Harness | One instrument or accessory dead | Instrument & Interior Harness group |
| Valve Control Harness | One function slow or dead, others normal | Valve Control Harness group |
| Aftertreatment Harness | Regeneration will not start | Aftertreatment Harness group |
| Breaker / Hammer Harness | Breaker will not fire, carrier runs fine | Breaker / Hammer Harness group |
External Harness 1 part
It is the outside harness on the machine body — exposed to rain, wash-down, mud and UV. On most machines it is the section most often replaced.
| Part # | Description | Price | Stock |
|---|---|---|---|
| 364-0247 | External Wiring Harness | $2198.90 | In stock |
Console Harness 1 part
It runs from the console or the armrest switch pod into the main cab loom.
| Part # | Description | Price | Stock |
|---|---|---|---|
| 324-5723 | Left Console Wiring Harness | $350.00 | In stock |
Instrument & Interior Harness 6 parts
It sits inside the cab, behind the trim, feeding the instruments and controls the operator sees and touches.
| Part # | Description | Price | Stock |
|---|---|---|---|
| 324-5823 | GPS Wiring Harness | $230.00 | In stock |
| 327-9967 | Cab Roof Wiring | $350.00 | In stock |
| 342-2891 | Hour Meter Wiring Harness | $50.00 | In stock |
| 342-3295 | Radio Wiring Harness | $300.00 | In stock |
| 360-6264 | Instrument Panel Wiring Harness | $200.00 | In stock |
| 377-8109 | Cab Interior Wiring Harness | $1786.00 | In stock |
Valve Control Harness 2 parts
It runs from the control valve block on the frame up to the ECM or the machine controller, clipped along the boom or the frame as it goes.
| Part # | Description | Price | Stock |
|---|---|---|---|
| 350-8424 | Telescopic Valve Wiring Harness | $280.00 | In stock |
| 364-0243 | Control Valve Wiring Harness | $339.90 | In stock |
Aftertreatment Harness 1 part
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.
| Part # | Description | Price | Stock |
|---|---|---|---|
| 364-0241 | Aftertreatment Wiring Harness | $735.90 | In stock |
Breaker / Hammer Harness 1 part
It runs from the breaker or hammer circuit on the boom to the control box in the cab, and takes more flexing than any other section on the machine.
| Part # | Description | Price | Stock |
|---|---|---|---|
| 350-8423 | Breaker Wiring Harness | $1000.00 | In stock |
Not sure which of the 12 sections is yours?
Send a photo of the tag on your old harness to WhatsApp +86-13714733803 and we will confirm the part number against this list before you order. Getting the section wrong is the most common reason a replacement does not fit.