The following Wiring Diagram applies for Volvo S40 and V40 2004 models. Herein you will find detail information about the electrical specification, features, maintenance, and service procedures. Every component has a component designation consists of two parts. The first part is a type number that describes the type of component in question, for example 3/xx. The second part of the designation is a serial number, for example, x/2.
This wiring diagram manual is divided into sections which cover discussion on electrical distribution, fuses, relays, distribution rails, ground connection, control modules, electrical cooling fan, charging circuit, etc.
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