Caterpillar 336 Wiring Harness — All 5 Sections
The Caterpillar 336 uses 5 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 |
|---|---|---|
| Engine Harness | Intermittent misfire or a dead cylinder | Engine Harness group |
Engine Harness 3 parts
It runs inside the engine compartment, clipped along the block and head and routed past the front cover. On most machines it is the longest harness on the engine side and the one closest to exhaust heat.
| Part # | Description | Price | Stock |
|---|---|---|---|
| 542-9912 | Engine Wiring Harness | $417.00 | In stock |
| 542-9915 | Engine Wiring Harness | $417.00 | In stock |
| 543-3465 | Engine Wiring Harness | $744.00 | In stock |
Wiring Harness 2 parts
| Part # | Description | Price | Stock |
|---|---|---|---|
| 522-7072 | Wiring Harness | $208.00 | In stock |
| 584-6814 | Wiring Harness | $1726.00 | In stock |
Not sure which of the 5 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.