A transient high tension (25,000 V) occurs at the
bulb sockets of the high intensity discharge
(HID) lamps when the combination light switch
is turned ON. It may cause serious electrical
shock or electrocution if you do not observe the
cautions below.

CAUTION

•

Never turn on the combination light switch
before fitting the HID bulbs to their bulb
sockets and completing the reassembly of
the headlight assembly.

•

Do not service the headlight assembly in wet
conditions, such as rain or snow, near a
sprinkler system, or when your hands are
wet to prevent electrocution.

•

Do not touch the surface of the HID bulbs
with your bare hands and do not stain it with
any oils or fats.

•

Do not disassemble the inverter unit and the
igniter unit.

•

Do not turn on the HID bulb by using a power
source other than the battery mounted on the
vehicle.

Daytime Running Lights

When you turn the ignition switch to ON (II) with the
parking brake released, the daytime running lights
control unit supplies about 6 volts to the RED/BLU
wire (cavity 10), about 12 volts to the YEL/BLU wire
(cavity 1), and ground to the RED/BLU wire (cavity
11). This provides about 6 volts to both high beam
headlights, causing them to come on at reduced
brightness. If you apply the parking brake, ground is
applied to the daytime running lights control unit at
the GRN/WHT wire. If the parking brake is applied
before you turn the ignition switch to ON (II), the
daytime mode will remain off until you release the
parking brake. Once the high beams are in the
daytime mode, applying the parking brake will not
turn them off. When you switch to low beam, high
beam, or flash-to-pass operation, ground is applied
to the daytime running lights control unit through the
PNK wire, and the control unit then turns off the
daytime running lights mode.

Low Beams

The headlight low beam and high beam relays
receive battery voltage at all times. When you turn
the headlight switch to the HEAD position with the
dimmer switch in LOW, ground is applied through
the BLU/RED wire and lighting diode to the coils of
the headlight low beam and high beam relays. This
energizes the relays, applying battery voltage to the
left and right low beam headlights through fuses 46
and 45, which are grounded by G301 and G201
respectively.

High Beams

When you pull the dimmer switch to HIGH with the
low beams already on, ground is applied to the
dimmer relay from the dimmer switch. This
energizes the dimmer relay, applying ground
through the RED/BLU wire to the daytime
running lights control unit (cavity 10). The control
unit applies voltage to the high beam bulbs and
high beam indicator, which turns on the high beams
and indicator light. The low beam headlights go off
because their ground path is interrupted by the
activated dimmer relay.

Flash-to-Pass

When you hold the flash-to-pass switch in the ON
position, ground is applied through the BLU/RED
wire and the lighting diode to the coils of the
headlight low beam and high beam relays and
through the RED/BLU wire to the coil of the dimmer
relay. This energizes the headlight low beam and
high beam relays, applying battery voltage to the
low beam bulbs and the daytime running lights
control unit, and to the dimmer relay. The dimmer
relay is energized, applying ground through the
RED/BLU wire to the daytime running lights control
unit. The control unit applies voltage to the high
beam bulbs and high beam indicator, which turns
on the high beams and indicator light. The low
beams go off because their ground path is
interrupted by the activated dimmer relay.

2004 American Honda Motor Co., Inc.

Circuit Index

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