Component Wiring Diagram, Schematic Layout
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The wiring diagram below is for the 80A alternator.
From point C8 the coil in relay 349 gets negative via the "A" output on the charging regulator through the alternator magnetizing winding and to the body. This causes the contacts on relay 349 to close and the voltage feed in power path 10, which is necessary in order to be able to switch off the battery master switch 342 with the operating switch 144, cuts out. The engine then starts and the alternator begins to charge (red, green marking), voltage is led through the same cable from the "A" output on the charging regulator so that activation of relay 349 ceases, that is, the relay returns to the rest position and closes the circuit. The coil in relay 361 is thereby voltage-fed from fuse "10" at current path 10 (green marking) and, should the battery master switch now switch off, this means that nothing happens to relay 361.
Under power path 9 there is a quadratic symbol with a K. This is a connection point for the body electrical system. From the component at just this point the warning flashers are voltage-fed as well as other functions which may be legally required, e.g., activating the engine solenoid valve when the emergency switch 180 is switched on.
This component wiring diagram manual covers only the wiring of the electrical components mounted on the chassis during its production in our chassis factory. For the body electrical system there are recommended connections marked K (refer to rear of manual for list of body connections).
The body builder decides which of these connections are to be used. For this reason the electrical system will vary depending on manufacture, type of bus, etc.