Ford Falcon. Manual — part 368

417-01-11 Exterior

Lighting 417-01-11

DIAGNOSIS AND TESTING (Continued)

PINPOINT TEST C : THE HIGH BEAMS ARE INOPREATIVE

Test Step

Result / Action to Take

C1

CHECK CIRCUIT 12 (G-O) FOR A SHORT TO GROUND

Disconnect: RH high beam headlamp C-159 or LH high beam

Yes

headlamp C-160.

Repair circuit 12 (G-O).
Test the system for normal operation.

Measure the resistance between RH high beam headlamp C-159,
circuit 12A (G-O), harness side or LH high beam headlamp C-160,

No

circuit 12C (G-O), harness side and ground.

Go to C2

Is the resistance less than 5 ohms?

C2

CHECK CIRCUIT 12 (G-O) FOR AN OPEN

Disconnect: Headlamp high beam relay, PDB C-163 relay 4 (40A).

Yes

Go to C3

Measure the resistance between RH high beam headlamp C-159,
circuit 12A (G-O), harness side or LH high beam headlamp C-160,

No

circuit 12C (G-O), harness side and headlamp high beam relay, PDB

Repair circuit 12 (G-O).

relay 4 (40A), circuit 12 (G-O), harness side.

Test the system for normal operation.

Is the resistance less than 5 ohms?

C3

CHECK CIRCUIT 20 (G-R) FOR AN OPEN

Disconnect: Multifunction Switch C-167.

Yes

Go to C4

Measure the resistance between the headlamp high beam relay, PDB
C-163 relay 4 (40A), circuit 20 (G-R), harness side and Multifunction

No

switch C-167, circuit 20 (G-R, harness side.

Repair circuit 20 (G-R).
Test the system for normal operation.

Is the resistance less than 5 ohms?

C4

CHECK THE MULTIFUNCTION SWITCH

Perform the Multifunction switch testing in Section 211-05.

Yes

Replace the high beam headlamp relay.

Is the Multifunction switch operating correctly?

Test the system for normal operation.

No

See Multifunction switch in Section 211-05.

One low beam headlamp is inoperative

Possible causes:

Circuit 13 (R-B) short to ground
Circuit 57 (B) open

PINPOINT TEST D : ONE LOW BEAM HEADLAMP IS INOPERATIVE

Test Step

Result / Action to Take

D1

CHECK THE HEADLAMP LOW BEAM VOLTAGE INPUT

Disconnect: Inoperative low beam headlamp.

Yes

Repair circuit 57 (B).

Turn ON low beam headlamps.

Test the system for normal operation.

Measure the voltage between RH low beam C-159, circuit 13A (R-B),

No

harness side or LH low beam C-160, circuit 13C (R-B), harness side

Repair circuit 13 (R-B).

and ground.

Test the system for normal operation.

Is the voltage greater than 10 volts?

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417-01-12 Exterior

Lighting 417-01-12

DIAGNOSIS AND TESTING (Continued)

One high beam headlamp is inoperative

Possible causes:

Circuit 12 (G-O) short to ground
Circuit 57 (B) open

PINPOINT TEST E : ONE HIGH BEAM HEADLAMP IS INOPERATIVE

Test Step

Result / Action to Take

E1

CHECK THE HEADLAMP HIGH BEAM VOLTAGE INPUT

Disconnect: Inoperative high beam headlamp.

Yes

Repair circuit 57 (B).

Turn ON high beam headlamps.

Test the system for normal operation.

Measure the voltage between RH high beam C-159, circuit 12A (G-O

No

), harness side, RH low beam C-159, circuit 12C (G-O ), harness side,

Repair circuit 12 (G-O).

LH low beam C-160, circuit 12E (G-O ), harness side or LH high

Test the system for normal operation.

beam C-160, circuit 12D (G-O), harness side and ground.

Is the voltage greater than 10 volts?

The headlamps are on continuously

Possible causes:

Multifunction switch C-167
Low beam headlamp relay
Circuit 18 (O) short to ground
Circuit 13 (R-B) short to power
High beam headlamp relay
Circuit 20 (G-R) short to ground
Circuit 12 (G-O) short to power

PINPOINT TEST F : THE HEADLAMPS ARE ON CONTINUOUSLY

Test Step

Result / Action to Take

F1

CHECK THE MULTIFUNCTION SWITCH

Disconnect: Multifunction switch C-167.

Yes

Go to F2

Are the headlamps illuminated?

No

Perform the Multifunction switch testing in
Section 211-05.
Test the system for normal operation.

F2

CHECK CIRCUIT 18 (O) FOR A SHORT TO GROUND

Measure the resistance between Multifunction switch C-167, circuit 18

Yes

(O), harness side and ground.

Repair circuit 18 (O).
Test the system for normal operation.

Is the resistance less than 5 ohms?

No

Go to F3

F3

CHECK CIRCUIT 20 (G-R) FOR A SHORT TO GROUND

Measure the resistance between Multifunction switch C-167, circuit 20

Yes

(G-R), harness side and ground.

Repair circuit 20 (G-R).
Test the system for normal operation.

Is the resistance less than 5 ohms?

No

Go to F4

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417-01-13 Exterior

Lighting 417-01-13

DIAGNOSIS AND TESTING (Continued)

Test Step

Result / Action to Take

F4

CHECK HEADLAMP LOW BEAM RELAY

Disconnect: Low beam headlamp relay, PDB C-163 relay 5 (40A).

Yes

Go to F5

Are the headlamps illuminated?

No

Install a new low beam headlamp relay.
Test the system for normal operation.

F5

CHECK CIRCUIT 13 (R-B) FOR A SHORT TO POWER

Measure the voltage between the low beam headlamp relay, PDB

Yes

C-163 relay 5 (40A), circuit 13 (R-B) harness side and ground.

Repair circuit 13 (R-B).
Test the system for normal operation.

Is the voltage greater than 10 volts?

No

Go to F6

F6

CHECK THE HEADLAMP HIGH BEAM RELAY

Disconnect: High beam headlamp relay, PDB C-163 relay 4 (40A).

Yes

Repair circuit 12 (G-O).

Are the headlamps illuminated?

Test the system for normal operation.

No

Install a new high beam headlamp relay.
Test the system for normal operation.

PINPOINT TEST G : TWILIGHT SENSOR/SUN SENSOR NOT WORKING

NOTE: The sunload sensor must not be covered with a dash mat or other item, as this will prevent the

optimum performance of the automatic climate control system and the automatic headlamp operation.

Test Step

Result / Action to Take

G1

CHECK HEADLAMPS

Turn on the ignition.

Yes

Go to G2

Turn the headlamp switch to AUTO position.

No

Cover the Sun Sensor.

Go to G3

Do the headlamps turn on after 2 Seconds?

G2

CHECK HEADLAMPS

With the ignition on and the headlamp switch in the AUTO position,

Yes

uncover the Sun Sensor.

System OK.

Shine a torch on the light sensor.

No

Go to G3

Do the headlamps turn off after 15 Seconds?

G3

CHECK DTC LOG

Turn off the ignition.

Yes

Go to G4

Connect WDS.

No

Turn on the ignition.

Refer to BEM Diagnostics.

Is DTC $9790 or $9791 logged?

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417-01-14 Exterior

Lighting 417-01-14

DIAGNOSIS AND TESTING (Continued)

Test Step

Result / Action to Take

G4

CHECK PIN J 1/18 FREQUENCY

Disconnect J1 from BEM.

Yes

Go to G5

Turn Head lamp Switch to AUTO position.

No

Turn Ignition ON.

Go to G6

Using CRO on WDS back probe J 1/18.

Are the following values as specified?Sensor Covered:J1=
approx 400HzSensor uncovered and torch shining:J1 = approx
50Hz

G5

CHECK IN J 2/6 VOLTAGE

Disconnect J2 from BEM.

Yes

Refer to BEM Diagnostics

Turn Head lamp Switch on AUTO.

No

Turn Ignition ON.

Go to G7

Using Voltmeter back probe J 2/6.

Are the following values as specified?Sensor Covered:J2 =
approx 0.7VSensor uncovered and torch shining:J2 = approx
4.5V

G6

CHECK CIRCUIT 234D CONTINUITY

Disconnect harness connector from Sun Sensor.

Yes

Go to G7

Check for short to B+, short to ground and continuity of circuit 234D.

No

Is circuit 234D OK?

Check & Repair circuit 234D.

G7

CHECK CIRCUIT 234E CONTINUITY

Disconnect harness connector from Sun Sensor.

Yes

Go to G8

Check for short to B+, short to ground and continuity of circuit 234E.

No

Is circuit 234E OK?

Check & Repair circuit 234E.

G8

CHECK CIRCUIT CN 1-3 RESISTANCE

Disconnect harness connector from Sun Sensor.

Yes

Go to G9

Back probe CN1 - 3 with an ohmmeter to ground.

No

Is the following value as specified?Less than 1 ohm

Check & Repair ground circuit to Sun Sensor.

G9

CHECK CIRCUIT CN 2-2 RESISTANCE

Disconnect harness connector from Sun Sensor.

Yes

Replace Sun Sensor.

Turn Ignition ON.

No

Back probe CN2 - 2 with an ohmmeter to ground.

Check & Repair Power Supply Circuit to Sun

Is the following value as specified?Battery voltage to be 9-13

Sensor. (including Head Lamp Switch assembly)

volts with ignition OFF.

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