Description

Heated Front Screen Description
The heated front screen (HFS) is operated from a non-latching switch located to the left of the instrument pack. The switch has an indicator light to show when the HFS is operating. The HFS comprises two elements laminated in the screen, each element being controlled by a separate fuse. The HFS will only function with the engine running, due to the high current draw and subsequent load on the battery.

The HFS can also be operated by the air temperature control ECU on vehicles fitted with air conditioning.

Heated Front Screen Supply

Circuit supply
A feed from the battery positive terminal is connected by an R wire to the engine compartment fusebox, where it passes through fusible links 1, 7, 8 and fuse 13. Fusible links 1 and 7 are connected in series.

A feed from fusible link 1 is connected to the contacts of the heated front screen relay in the engine compartment fusebox.

A feed from fusible links 1 and 7 is connected to the contacts of the auxiliary circuits relay in the engine compartment fusebox.

A feed from fuse 13 is connected from the engine compartment fusebox to the Body Control Unit (BCU) on a PN wire.

A feed from fusible link 8 in the engine compartment fusebox is connected on an NW wire to the passenger compartment fusebox and from the fusebox 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 flows through the ignition switch to the passenger compartment fusebox on an LGW wire. The feed continues through fuse 26 in the passenger compartment fusebox and is connected on an LG wire to the coil of the auxiliary circuits relay in the engine compartment fusebox.

In this condition, the auxiliary circuits relay coil is energised and the contacts close. The relay coil is earthed to earth header C0018 on a B wire from the engine compartment fusebox, via header C0286 LHD/C0288 RHD.

When the ignition switch is in position II, the feed from fusible link 8 flows through the ignition switch to the passenger compartment fusebox on a Y wire. The feed continues through fuse 29 in the passenger compartment fusebox and is connected to the BCU on a GU wire.