Volvo VNL 780 Operator's Manual page 436

426 MAINTENANCE AND LUBRICATION
VNL Instructions
The headlight bulb can be accessed from the rear of the headlight assembly. Raise the hood.
In early production vehicles, remove the bulb cover by turning clockwise.
In later production vehicles, the cover can be removed in the normal counterclockwise
direction.
Note: In some cases, the cover seal may stick to the housing, which makes removal
difficult. Use special tool 85104355 to assist in removal. Contact your authorized Volvo
dealer for the tool.
With the cover removed, grasp the bulb assembly and turn counterclockwise to remove.
Disengage the wiring connector and remove the bulb from the vehicle.
Engage the wiring harness connector to the replacement bulb assembly. Install into the
headlamp housing. Check the bulb cover seal and install the bulb cover. Lower the hood
and check for proper headlamp operation.
1 Low Beam Headlight (Cover
Installed)
2 High Beam Headlight (Cover
Removed)
W3005350