Interior lamps (page 2 of 2)

Ignition, interior and footwell lamps The ignition switch illumination (C0028), LH front footwell lamp (C0078), RH front footwell lamp (C0076) and interior lamps (C0355) all have an earth route through the multi function ECU (C0062) on PR wires. The multi function ECU controls the earth connection to automatically operate the lamps together, when the doors open and close and the ignition is switched on. When a door opens, the related door switch closes and connects an earth to the multi function ECU (C0062) via a PS wire from the RH door switch (C1451 on LHD, C1449 on RHD) or a PW wire from the LH door switch (C1449 on LHD, C1451 on RHD).

When either or both of the doors open, the ignition switch illumination, footwell lamps and interior lamps are illuminated. The multi function ECU extinguishes the lamps as follows:

The lamps will fade out immediately on the first occasion that the last door is closed and the ignition switch is not in position II. Subsequent opening and closing of the door(s) will result in the lamps remaining on for approximately 18 seconds, after the last door closes, and then fading out. When the lamps are illuminated with both doors closed, turning the ignition switch to position II will cause the lamps to immediately fade out. The lamps will immediately fade out when the doors are locked using either the key or the remote handset. If a door is left open, the lamps will fade off after approximately 9 minutes.

In addition to automatic operation, each interior lamp (C0355) has a manual switch which provides a route to earth on a B wire connected to an earth header (C0018) and hence illuminates the interior lamp regardless of the door and ignition switch positions.