Cab Interior Lamp - jcb JS300 Service Manual

Overview
The interior light can
automatically to illuminate the cab.
There are three settings for the interior light:
– Off
– Automatic - light illuminates when the cab door is
opened
– Manual - light is switched on manually.
Wires and Connectors
K Fig 17. ( T C-140)
Automatic operation - With the ignition off, the automatic
mode will operate when the cab door is opened. The door
sensor (C148) detects the door movement and initiates the
auto mode. 24V connects via fuse 22 on the main fuse
board (C100 X4) to the light (C059) and the door sensor
(C148).
When the door sensor closes 24V connects to the wake up
diode (C127). 24V connects via the wake up diode to the
MECU J1 (C015) pin 22 to wake up the system. 24V
connects to the MECU J2 (C016) at pin 30 to signal the
door has been opened. The MECU J1 pin 26 will now
energise the interior light (C059) and the console
illumination (C147). Once the ignition is turned on the
wake up function will turn off along with the interior light.
Manual mode - With the ignition on the interior light (C059)
can pressed in either direction to turn the light on via its
internal switch.
Fig 16. Harness connectors C059-1, C059-2, C059-3,
C148-1 and C148-2
C-139

Cab Interior Lamp

be operated manually or
C129480-C12.eps
9813/5100-1
Section C - Electrics
Cab Systems and Lighting
Cab Interior Lamp
C-139