Volvo VNL Service Manual page 27

Group 30 Electrical System—VNL, VNM
Switch
Function
Engine Brake
On/Off (Caterpillar,
Detroit, Cummins
N14)
Engine Brake
Low/Med/High
(Caterpillar, De-
troit, Cummins
N14)
Engine Brake
Off/Low/Hi
(VOLVO & Cum-
mins M11)
Pneumatic/Electrical Switches
Switch
W3000574
Switch
W3000578
W3000579
W3000578
Switch
Function
Interaxle DLO
Fifth Wheel
Slide
Suspension
Dump
Interwheel DLO
W3000573
Internal Switch Logic
W3000577
W3000577
W3000577
Terminal
A B
To Cluster +12V Supply
Telltale Lamp
To Cluster Not used
Telltale Lamp
To Cluster Not used
Telltale Lamp
N/A Not used
Design and Function
W3000589
W3000583
W3000597
C D
Ground +12V Illumination
Control
Ground +12V Illumination
Control
Ground +12V Illumination
Control
Ground +12V Illumination
Control
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