ICE/Satellite Navigation Operation (Description and operation)

A feed from fusible link 7 in the engine compartment fusebox is also connected to fuse 17 in the passenger compartment fusebox on a PG wire. From fuse 17 the feed is connected to the power amplifier by a LGP wire. The power amplifier is connected to earth header C0708 by a B wire.

Fusible link 8 in the engine compartment fusebox is also connected to the permanent supply. From fusible link 8 a feed is connected to the passenger compartment fusebox on an NW wire. From the passenger compartment fusebox the feed flows to the ignition switch on an N wire.

Ignition switch supply When the ignition switch is in position I or II, the feed from fusible link 8 in the engine compartment fusebox flows from the ignition switch to fuse 26 in the passenger compartment fusebox on an LGW wire. From fuse 26 the feed is connected on an LG wire to the coil of the auxiliary circuits relay, which is connected via header C0286 LHD/C0288 RHD to earth header C0018 on a B wire. The auxiliary circuits relay is energised, closing the relay contacts.

From the closed contacts of the auxiliary circuits relay, a feed flows on a WG wire to fuse 16 in the passenger compartment fusebox. From fuse 16, a feed is connected to the aerial amplifier by an LGO wire. A second feed from fuse 16 supplies power to the on/off switch of the head unit and to the interface module, via splice A47/A194, on an LGP wire. The interface module is earthed on a B wire to earth point C0361-1 via splice A22/A190.

ICE/Satellite Navigation Operation

Head unit When the power switch on the head unit is turned on, an enable signal is sent from the head unit to the power amplifier. The enable signal consists of a power feed on an RU wire via header C0285 LHD/C0761 RHD.