System Description For Canada

The headlamp system for Canada vehicles contains a daytime light control unit. This unit 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, 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. If the daytime light control unit receives a ground signal from the generator the daytime lights will not be illuminated. The daytime lights will illuminate once a battery positive voltage signal is sent to the daytime light control unit from the generator.
Power is supplied at all times:
^ through 15 A fuse (No. (39), located in the fuse and fusible link box)
^ to daytime light control unit terminal (2) and
^ to lighting switch terminal (5).
Power is also supplied at all times:
^ through 15 A fuse (No. (40), located in the fuse and fusible link box)
^ to daytime light control unit terminal (3) and
^ to lighting switch terminal (8).
With the ignition switch in the ON or START position, power is supplied:
^ through 7.5 A fuse (No. (8), located in the fuse block [J/B])
^ to daytime light control unit terminal (12).
With the ignition switch in the START position, power is supplied:
^ through 7.5 A fuse (No. (26), located in the fuse block [J/B])
^ to daytime light control unit terminal (1).
Ground is supplied to daytime light control unit terminal (9) through body grounds (M43), (M44) and (M60).

HEADLAMP OPERATION
Low beam operation
When the lighting switch is turned to headlamp "ON" (2ND) position, "LOW BEAM" (B) position, power is supplied:
^ from lighting switch terminal (7)
^ to RH headlamp terminal (3) (with 2-doors)
^ to RH headlamp terminal (2) (with 4-doors).
Ground is supplied:
^ to RH headlamp terminal (2) (with 2-doors)
^ to RH headlamp terminal (3) (with 4-doors)
^ through body grounds (E13) and (E25).
Also, when the lighting switch is moved to headlamp "ON" (2ND) position, "LOW BEAM" (B) position, power is supplied:
^ from lighting switch terminal (10)
^ to LH headlamp terminal (3) (with 2-doors)
^ to LH headlamp terminal (2) (with 4-doors).
Ground is supplied:
^ to LH headlamp terminal (2) (with 2-doors)
^ to LH headlamp terminal (3) (with 4-doors)
^ from daytime light control unit terminal (7)
^ through daytime light control unit terminal (9)
^ through body grounds (M43), (M44) and (M60).
With power and ground supplied, the low beam headlamps illuminate.

High beam operation/Flash-to-pass operation
When the lighting switch is moved to headlamp "ON" (2ND) position, "HIGH BEAM" (A) or "FLASH TO PASS" (C) position, power is supplied:
^ from lighting switch terminal (6)
^ to RH headlamp terminal (1) and
^ from lighting switch terminal (9)
^ to daytime light control unit terminal (5), and
^ to combination meter terminal (13) ((12)) for the hi beam indicator
^ through daytime light control unit terminal (6)
^ to LH headlamp terminal (1).
Ground is supplied in the same manner as low beam operation.
Ground is supplied to terminal (18) ((11)) of the combination meter through body grounds (M43), (M44) and (M60).
With power and ground supplied, the high beam headlamps and hi beam indicator illuminate.

*: Terminal numbers in ( ) are for models without tachometer.

DAYTIME LIGHT OPERATION
With the engine running and the lighting switch in the "OFF" or parking lamp (1ST) position and parking brake released, power is supplied:
^ to daytime light control unit terminal (3)
^ through daytime light control unit terminal (6)
^ to LH headlamp terminal (1)
^ through LH headlamp terminal (3) (with 2-doors)
^ through LH headlamp terminal (2) (with 4-doors)
^ to daytime light control unit terminal (7)
^ through daytime light control unit terminal (8)
^ to RH headlamp terminal (1).
Ground is supplied:
^ to RH headlamp terminal (2) (with 2-doors)
^ to RH headlamp terminal (3) (with 4-doors)
^ through body grounds (E13) and (E25).
Because the high beam headlamps are now wired in series, they operate at half illumination.