Cadillac CTS (2003-2007) – Fuse and Relay Box Diagram
In this article, we take a detailed look at the first-generation Cadillac CTS, produced from 2003 to 2007. You will find complete fuse box diagrams for model years 2003, 2004, 2005, 2006, and 2007.
The guide provides the exact locations of all fuse panels inside the vehicle, including the dashboard, under-hood power distribution box, and rear compartment fuse panel (if equipped). Each diagram clearly shows the assignment and function of every fuse and relay (fuse layout), allowing you to quickly identify the correct circuit.
This resource is useful for troubleshooting issues with headlights, fuel pump, HVAC system, power windows, infotainment, ignition, and other electrical components. Whether you are a DIY vehicle owner or a professional technician, this guide ensures safe and efficient fuse replacement and electrical maintenance.
With organized diagrams and step-by-step instructions, servicing the Cadillac CTS (2003–2007) electrical system becomes straightforward, reliable, and safe.