CAT 502-5390 Machine Wiring Harness — Internal Wire Harness
The CAT 502-5390 is the OEM internal machine wiring harness for Caterpillar heavy equipment. Wrapped in Caterpillar's signature orange braided protective sleeving, this harness routes electrical signals and power throughout the machine — connecting the ECM, sensors, solenoids, and cab electronics. A damaged or broken harness causes intermittent faults, fault codes, and electrical failures that can halt operation entirely.
Harness Features
- OEM Part Number: 502-5390
- Brand: CAT / Caterpillar
- Type: Machine Internal Wiring Harness
- Sleeving: Orange braided protective loom (OEM Caterpillar standard)
- Connectors: Multiple Deutsch DT/DTM connectors with red secondary locks + large multi-pin chassis connectors
- Condition: Used — inspected, no burnt wires or broken connectors
Compatible Applications
- Caterpillar medium to large excavators (336D / 336E / 340D / 349D / 349E series)
- Contact us with your machine serial number to confirm fitment before ordering
Why Choose BuyECM?
- ✅ Electrical specialists — every harness inspected for continuity and connector integrity
- ✅ OEM quality — genuine Caterpillar braided sleeving and connectors
- ✅ Anti-static packaging — protected during transit
- ✅ Fast worldwide shipping — DHL / FedEx / EMS with tracking
- ✅ Expert support — send your machine serial number for compatibility confirmation
⚠️ Important: Please provide your machine serial number before ordering to confirm this harness matches your application. Harness routing and connector positions vary by machine year and configuration.
📦 Shipping: Dispatched within 1–2 business days. Tracking provided automatically.