Group 30 Electrical System—VNL, VNM
Design and Function
Fuse and Relay Locations
W8000923
TEC in Center Dash
The vehicle’s instrumentation, gauges and other electri-
cally controlled parts are wired through the Truck Electri-
cal Center (TEC).
The TEC is located in the center of the dash, just above
the engine cover. The relays are accessed through the
top panel, and the fuses through the front or top panel. All
fuses and relays may not be used in every vehicle. Refer
to the decal inside the TEC cover for vehicle’s exact fuse
locations and ratings.
New features in the TEC include maxi-fuses, micro-relays
and additional multifunction modules. The maxi-fuses are
designed for larger amounts of current than regular fuses.
The micro-relays are smaller in size than conventional
relays, and the pin arrangement is different.
Accessory and ignition power relays, and the daytime
running light module are mounted under the relay panel.
They are accessed by removing the top TEC tray.
Several multifunction modules are also mounted under the
relay panel. The combi relay (with VE D12 engine only),
windshield wiper module and central door lock module are
mounted here. For more information on the combi relay,
see the
Electronic Control System, VE D12 – VOLVO
manual. The windshield wiper module and central door
lock module are covered later in this manual.
W3000777
Relay Pin Arrangement and Schematic
W3000778
Micro-relay Pin Arrangement and Schematic
Note: Relays are shown from insertion-side view.
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