CAT 3126B & 3126E Electrical System Schematic (PDF)

Description

This official Caterpillar electrical schematic provides a complete overview of the wiring layout, connections, and component locations for the 3126B and 3126E on-highway engine platforms. Designed for diagnostic and repair use, it’s an essential reference for technicians working on electrical systems in Cat-powered vehicles.

📘 What’s INSIDE:

• Full electrical circuit diagrams

• Power distribution and ground locations

• ECM connector pinouts and signal flow

• Sensor and actuator wiring paths

• Harness routing and terminal IDs

• Color-coded wiring charts

🛠️ Ideal For:

• Diesel technicians and electrical specialists

• Fleet maintenance shops and upfitters

• Vocational truck and bus repair professionals

⚙️ Engine Coverage:

• Caterpillar 3126B

• Caterpillar 3126E

• Common in trucks, buses, and medium-duty commercial vehicles

📥 Format:

• Digital PDF download

• Printable and zoomable for detailed circuit tracing

Note: This schematic is a wiring layout reference. For testing procedures and component replacement steps, use in conjunction with the appropriate troubleshooting or service manual.