System Description (For Canada))

The headlamp system for Canada vehicles contains a daytime light control module that activates the high beam headlamps at approximately half illumination whenever the engine is running. If the parking brake is applied before the engine is started the daytime lights will not be illuminated. The daytime lights will illuminate once the parking brake is released. Thereafter, the daytime lights will continue to operate when the parking brake is applied.
Power is supplied at all times
^ through 15 A fuse (No. (36), located in the fusible link and fuse box)
^ to daytime light control module terminal (3) and
^ to lighting switch terminal (5).
Power is also supplied at all times
^ through 15 A fuse (No. (37), located in the fusible link and fuse box)
^ to daytime light control module terminal (4),
^ to lighting switch terminal (8).
With the ignition switch in the ON or START position, power is supplied
^ through 10 A fuse (No. (26), located in the fuse block)
^ to daytime light control module terminal (5).
Ground is supplied to daytime light control module terminal (10) through body grounds (M51), (M76) and (M77).


HEADLAMP OPERATION
Low beam operation
When the lighting switch is moved to the HEAD position (low beam operation), power is supplied
^ from lighting switch terminal (7)
^ to RH headlamp terminal (1).
Ground is supplied to RH headlamp terminal (3) through body grounds (E12) and (E37).
Also, when the lighting switch is moved to the 2ND position and placed in LOW ("B") position (low beam operation), power is supplied
^ from lighting switch terminal (10)
^ to LH headlamp terminal (1).
Ground is supplied
^ to LH headlamp terminal (3)
^ from daytime light control module terminal (8)
^ through daytime light control module terminal (10)
^ through body grounds (M51), (M76) and (M77).
With power and ground supplied, the low beam headlamps illuminate.

High beam operation
When the lighting switch is moved to the 2ND position and placed in HIGH ("A") position, power is supplied
^ from lighting switch terminal (6)
^ to RH headlamp terminal (2).
Also, when the lighting switch is moved to the 2ND position and placed in HIGH ("A") position, power is supplied
^ from lighting switch terminal (9)
^ to daytime light control module terminal (6)
^ through daytime light control unit terminal (7)
^ to LH headlamp terminal (2).
Ground is supplied in the same manner as low beam operation.
With power and ground supplied, the high beam headlamps illuminate.

DAYTIME LIGHT OPERATION
With the engine running and the lighting switch in the OFF position, power is supplied
^ to daytime light control module terminal (4)
^ through daytime light control module terminal (7)
^ to LH headlamp terminal (2)
^ through LH headlamp terminal (3)
^ to daytime light control module terminal (8)
^ through daytime light control module terminal (9)
^ to RH headlamp terminal (2).
Ground is supplied to RH headlamp terminal (3) through body grounds (E12) and (E37).
Because the high beam headlamps are now wired in series, they operate at half illumination.