Wires and fuses

In Mercedes individual wires are usually assembled into bundles and are enclosed in a black sheath, which makes it difficult to find the necessary wires. Can help to orient in this case multiple connectors, of which the exact position and the number of members specified in the wiring diagrams. Wire size is selected depending on the power of the consumer: the control lamps sufficient cross-sectional area of 0.5 mm2 is required for the starter wire 16 mm2. Too thin wire may overheat, causing voltage drops. As a result, to the range, for example, comes not 12, but 10 or even 9.5 - their light is dim.

For the majority of consumers are connected two wires. But usually trace the path to the battery or generator can only be for one of them. Another wire is often already a few centimeters is attached to the metal parts of the bodywork, the engine or transmission. This is a clear example of how automakers use for their own purposes the physical principle that the metal parts, electricy called "mass", conductive. Thus saving a large number of wires for a short circuit from the consumer to the negative terminal of the battery, transferring the function of "mass." If a user does not work, the cause is often lost contact with "weight". In this case, contact with the "weight" of the consumer through detours, which causes disturbances in the overall system. For electrical work requires a certain delay. Fuses and wiring tables presented in this book will help you to understand. Mounting block (Fig. 9.36) is located under the cover, which protects against moisture and splashing in the rear right side of the engine compartment.

The negative battery cable is connected to "weight"

Current supply to the consumer is carried out through the wire, the path which with more or less difficulty can be traced to the battery, which is also reflected in the wiring. Return path provides electrically conductive metal parts of the body or engine. So saving a large number of wires. In some cases, the feedback circuit is still required a short wire - typically when the user is located directly on the metal parts. These so-called wire of "weight" always lead to points of contacts or "masses", distributed by the body and which are attached to the ends of the wires threaded connections.

The negative terminal of the battery is connected to the body or to "weight", as they call electricians. Always remember this: "minus" is connected to "weight".