For Canada

The headlamp system for Canada vehicles contains a daytime light control unit 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. (53), located in the fuse and fusible link box)
^ to headlamp relay LH terminals (1) and (3)
^ through 15 A fuse (No. (54), located in the fuse and fusible link box)
^ to headlamp relay RH terminals (1) and (3).
^ through 15 A fuse (No. (66), located in the fuse and fusible link box)
^ to tail lamp relay terminals (1) and (3).
With the ignition switch in the ON or START position, power is supplied
^ through 7.5 A fuse [No. (12) ,located in the fuse block (J/B)]
^ to daytime light control unit terminal (3), and
With the ignition switch in the START position, power is supplied
^ through 7.5 A fuse [No. (33), located in the fuse block (J/B)]
^ to daytime light control unit terminal (2).
Ground is supplied to daytime light control unit terminal (16) through body grounds (E5) and (E30).

HEADLAMP SWITCH OPERATION
When the lighting switch is turned to 2ND or PASS ("C") positions, ground is supplied
^ to headlamp relay LH and RH terminals (2)
^ from the lighting switch terminal (12).
Headlamp relay is then energized, and power is supplied
^ from headlamp relay LH terminal (5)
^ to combination meter terminal (21) for the HIGH BEAM indicator and
^ through daytime light control unit terminals (5) and (6)
^ to terminal (3) of the headlamp LH.
Power is also supplied
^ from headlamp relay RH terminal (5)
^ through daytime light control unit terminals (4) and (7)
^ to terminal (3) of the headlamp RH.

Low beam operation
When the lighting switch is turned to 2ND and LOW ("B") positions, ground is supplied
^ to terminal (2) of the headlamp LH
^ through daytime light control unit terminals (11) and (12)
^ through lighting switch terminals (10) and (8)
^ through body grounds (E5) and (E30).
Ground is also supplied
^ to terminal (2) of the headlamp RH
^ through daytime light control unit terminals (8) and (15)
^ through lighting switch terminals (7) and (5)
^ through body grounds (E5) and (E30).
With power and ground supplied, the low beam headlamps illuminate.

High beam operation/flash-to-pass operation
When the lighting switch is turned to 2ND and HIGH ("A") or PASS ("C") positions, ground is supplied
^ to terminal (1) of LH headlamp and combination meter terminal (20) for the HIGH BEAM indicator
^ through daytime light control unit terminals (10) and (13)
^ through lighting switch terminals (9) and (8)
^ through body grounds (E5) and (E30).
Ground is also supplied
^ to terminal (1) of RH headlamp
^ through daytime light control unit terminals (9) and (14)
^ through lighting switch terminals (6) and (5)
^ through body grounds (E5) and (E30).
With power and ground supplied, the high beam headlamps illuminate.