System Description (For Canada)

The headlamps are controlled by the headlamp control unit.
Power is supplied at all times
- through 15 A fuse (No. 37, located in the fuse and fusible link box)
- to headlamp control unit terminal 7 (for LH headlamp)
- through 15 A fuse (No. 36, located in the fuse and fusible link box)
- to headlamp control unit terminal 5 (for RH headlamp).

MANUAL OPERATION

Low Beam Operation
When the combination switch is placed in the LOW BEAM (B) position, with lighting switch in the headlamp ON (2ND) position, ground is supplied
- to headlamp control unit terminal 9
- through lighting switch terminal 8
- to lighting switch terminal 7
- through body grounds M68, M105 and M130.

Then power is supplied
- from headlamp control unit terminal 3
- to LH headlamp terminal 3
- from headlamp control unit terminal 6
- to RH headlamp terminal 3.
Ground is supplied to each headlamp terminal 2 through body grounds E3, E30 and E50.
With power and ground supplied, the low beam headlamps will illuminate.

High Beam Operation
When the lighting switch is placed in the headlamp ON (2ND) position, ground is supplied to headlamp control unit terminal 9 in the same manner as low beam operation.

With combination switch in the HIGH BEAM (A) position, ground is supplied
- to headlamp control unit terminal 18
- through combination switch terminal 11
- to combination switch terminal 14
- through body grounds E3, E30 and E50.

Then power is supplied
- from headlamp control unit terminal 8
- to LH headlamp terminal 1
- from headlamp control unit terminal 4
- to RH headlamp terminal 1
Ground is supplied to each headlamp terminal 2 through body grounds E3, E30 and E50.

With power and ground supplied, the high beam headlamps will illuminate.
Power is also supplied
- from headlamp control unit terminal 13
- to combination meter terminal 6 for the HIGH BEAM indicator.
Ground is supplied to combination meter terminal 12 through body grounds M68, M105 and Mi 30.
With power and ground supplied, the HIGH BEAM indicator will illuminate.

Flash to Pass Operation
When the combination switch is placed in the FLASH TO PASS (C) position, ground is supplied
- to headlamp control unit terminal 20
- through combination switch terminal 13
- to combination switch terminal 12
- through body grounds E3, E30 and E50.
Then power is supplied to each headlamp HIGH from headlamp control unit to turn on the lamps in the same manner as high beam operation.

DAYTIME LIGHT OPERATION
The headlamp system for CANADA vehicles contains a daytime light control system that activates the high beam headlamps at approximately half illumination whenever the engine is running (engine running signal is supplied to the headlamp control unit terminal 17 from generator L terminal).

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.
With the engine running, the lighting switch in the OFF or 1ST position and parking brake released, power is supplied
- to headlamp control unit terminal 11
- through headlamp control unit terminal 8
- to terminal 1 of LH headlamp.
And also
- through headlamp control unit terminal 4
- to terminal 1 of RH headlamp.
Ground is supplied to terminal 2 of LH and RH headlamps through body grounds E3, E30 and E50.