Ford Falcon. Manual — part 377

417-01-47 Exterior

Lighting 417-01-47

DIAGNOSIS AND TESTING (Continued)

PINPOINT TEST W : THE REVERSING LAMPS ARE ON CONTINUOUSLY

Test Step

Result / Action to Take

W1

CHECK CIRCUIT 140 (W-R) FOR A SHORT TO POWER

Disconnect either:

Yes

Repair circuit 140 (W-R).

(manual) Reverse Lamp Switch C-26.

Test the system for normal operation.

(automatic) Inhibitor switch and PRNDL switch C-12.

No

Measure the voltage between (manual) Reverse Lamp Switch C-26,

Perform the inhibitor switch and PRNDL switch

circuit 140 (W-R), harness side or (automatic) Inhibitor switch and

or reverse lamp switch testing in Section 307-01.

PRNDL switch C-12, circuit 140 (W-R), harness side and ground.

Test the system for normal operation.

Is the voltage greater than 10 volts?

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417-01-48 Exterior

Lighting 417-01-48

GENERAL PROCEDURES

Driving Beam

Headlamp Adjustment

1. The driving beam is fixed internally within the

Low Beam

headlamp relative to the low beam. Whenever the

(Refer to diagram on following page.)

low beam aim is adjusted the driving beam is also

adjusted.

1. To adjust the headlamp aim in accordance with

this specification, a flat vertical test screen as

shown is required. Alternatively an approved

headlamp aim testing device may be used.

2. The vehicle must have the correct tyre pressure,

must be unloaded, have a fully filled tank and the

hand brake must be in the fully released position.

3. The vehicle must be placed on a flat horizontal

surface and carefully positioned 10 metres from

the test screen.

4. Gently rock vehicle to obtain correct horizontal

vehicle attitude.

5. Measure H the height of the headlamp low beam

bulb centre above ground. For different lamps and

vehicles this height will vary due to vehicle

production tolerance.

6. Set the horizontal breakline on the test screen to

a height h = H-e where e is the aim setting

dimension.

7. Measure A the distance between the low beam

bulb centres. Using this dimension set up the low

beam aim centre C and construct the 15 inclined

breakline from this point on the test screen.

8. Switch on the low beam lights and cover all lamps

except the one that is being aimed.

9. Using the horizontal and vertical aim adjusting

screws shift the light pattern of the headlamp on

the test screen until the light/dark boundaries of

the light pattern coincides with the breaklines on

the test screen. The low beam pattern should now

be centred on point C.

10. Repeat the above procedure to adjust the

remaining headlamp.

High Beam

1. The high beam aim is fixed internally within the

headlamp relative to the low beam. Whenever the

low beam aim is adjusted the high beam aim is

also adjusted.

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417-01-49 Exterior

Lighting 417-01-49

GENERAL PROCEDURES (Continued)

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417-01-50 Exterior

Lighting 417-01-50

GENERAL PROCEDURES (Continued)

Fog Lamp Adjusment (XR Only)

(Refer to diagram on following page.)
1. To adjust the foglamp aim in accordance with this

specification, a flat vertical test screen as shown

is required.

2. The vehicle must have the correct tyre pressure,

must be unloaded, have a fully filled tank and the

hand brake must be in the fully released position.

3. The vehicle must be placed on a flat horizontal

surface and carefully positioned 5 metres from the

test screen.

4. Gently rock vehicle to obtain correct horizontal

vehicle attitude.

5. Measure H the height of the foglamp bulb centre

above ground. For different lamps and vehicles

this height will vary due to vehicle production

tolerance.

6. Set the horizontal line on the test screen to a

height h = H-e where e is the aim setting

dimension.

7. Switch on the fog lights and cover all lamps

except the one that is being aimed.

8. Using the vertical aim adjusting screw (accessible

from under the bumper with an 6 mm Allen key or

Phillips screw driver) shift the light pattern of the

foglamp on the test screen until the centre of the

of the light pattern Point C coincides with the line

at h on the test screen.

9. Repeat the above procedure to adjust the

remaining fog lamp.

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