260-5542 CAT C6.6 Engine Harness Ass‘y for Excavator E320D E323D Bulldozer D6N

260-5542 CAT Engine Harness Assy (Aftermarket Replacement) | 2605542 | ECM Harness

This product is an aftermarket replacement engine wiring harness for Caterpillar 260-5542 (2605542). In Cat parts catalogs, 260-5542 is described as a Harness Assembly (Engine) (Electronic Control Module). Cat notes this harness assembly is designed to provide reliable power and signal transmission for machine electronic devices and systems under harsh working conditions, and is used to transmit signal and power from the Electronic Control Module (ECM) to the engine.

When to Replace the Harness

• Intermittent shutdown / unstable signals

• Sensor/ECM fault codes or warning lights

• Blown fuses / short circuit due to rubbed wires

• Connector corrosion, oil contamination, broken pins

• Melted insulation near high-temperature zones

Fitment Verification (Strongly Recommended)

To avoid mismatch, please send:

1. Machine model + serial number (or engine information)

2. Photos of the old harness overall layout

3. Connector photos (pin count/shape) and branch photos
   We will confirm compatibility and reply with quotation and lead time.

Installation Notes

• Disconnect battery before installation

• Match connectors by shape/locking clip (do not force fit)

• Secure harness with clamps to prevent rubbing and heat damage

• Recheck fuses/grounds after installation

FAQ

Q1: Is 260-5542 the same as 2605542?

A: Yes, 2605542 is the same number without hyphens.

Q2: What is the official description of 260-5542?

A: Cat lists 260-5542 as a Harness Assembly (Engine) (Electronic Control Module).

Q3: How do I confirm fitment?

A: Use machine serial number and compare connectors/layout; Cat also provides serial-based parts diagram lookup tools.