RAM 2500 Truck 2WD L6-5.9L DSL Turbo VIN C (2002)
Hi-Beam Indicator Lamp: Description and Operation
HIGH BEAM INDICATOR
A high beam indicator is standard equipment on all instrument clusters. The high beam indicator is located near the upper edge of the instrument cluster
overlay between the tachometer and the speedometer. The high beam indicator consists of a stenciled cutout of the International Control and Display
Symbol icon for "High Beam" in the opaque layer of the instrument cluster overlay. The dark outer layer of the overlay prevents the indicator from being
clearly visible when it is not illuminated. A blue lens behind the cutout in the opaque layer of the overlay causes the icon to appear in blue through the
translucent outer layer of the overlay when it is illuminated from behind by a replaceable incandescent bulb and bulb holder unit located on the
instrument cluster electronic circuit board. The high beam indicator is serviced as a unit with the instrument cluster.
The high beam indicator gives an indication to the vehicle operator when the headlamp high beams are illuminated. This indicator is hard wired on the
instrument cluster electronic circuit board, and is controlled by a headlamp beam select switch input to the cluster. The headlamp high beam indicator
bulb receives battery current on the instrument cluster electronic circuit board through a fused B(+) circuit at all times; therefore, the indicator remains
operational regardless of the ignition switch position. The headlamp beam select switch is integral to the multi-function switch on the left side of the
steering column, and is connected in series between ground and the headlamp high beam indicator. The indicator bulb only illuminates when it is
provided with a path to ground through the high beam indicator driver circuit by the headlamp beam select switch. The high beam indicator can be
diagnosed using conventional diagnostic tools and methods.
