Ford Falcon. Manual — part 375

417-01-39 Exterior

Lighting 417-01-39

DIAGNOSIS AND TESTING (Continued)

C-706 Ute Style Side Box RH Tail Lamp

Pin Number(s)

Circuit Designation/Description

Normal Condition/Measurement

1

Circuit 14D (BR)

0 voltage, less than 5 ohms between RH rear

RH rear lamp power input

lamp and tail lamp relay

2

Circuit 57B (B)

0 voltage, less than 5 ohms between RH tail

RH tail lamp ground

lamp and chassis ground

C-708 Ute Style Side Box LH Tail Lamp

Pin Number(s)

Circuit Designation/Description

Normal Condition/Measurement

1

Circuit 14B (BR)

0 voltage, less than 5 ohms between LH rear

LH rear lamp power input

lamp and tail lamp relay

2

Circuit 57D (B)

0 voltage, less than 5 ohms between LH tail

LH tail lamp ground

lamp and chassis ground

Inspection and Verification

Visual Inspection Chart

Mechanical

Electrical

Multifunction switch

Junction Box (JB):

fuse 23 (15A)
relay 4 (20 A)

Circuitry

Parking, rear and

license lamp bulbs

Multifunction switch

Symptom Chart

Condition

Source

Action

The parking, rear and license lamps

Junction Box (JB):

Go to PinPoint Test R

are inoperative

fuse 23 (15A)
relay 4 (20 A)

Circuitry
Multifunction switch C-167

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417-01-40 Exterior

Lighting 417-01-40

DIAGNOSIS AND TESTING (Continued)

Condition

Source

Action

One or more parking, rear or license

Circuitry

Go to PinPoint Test S

lamps are inoperative

The parking, rear and license lamps

Junction Box (JB):

Go to PinPoint Test T

are on continuously

relay 4 (20 A)

Circuitry
Multifunction switch C-167

Circuit 175 (B-Y) open

Pinpoint Tests

Multifunction switch C-167

The parking, rear and license lamps are

Circuit 57CL (B) open

inoperative

Circuit 14 (BR) open or short to ground

Possible causes:

circuit 38G (Y-R) open or short to ground
Tail lamp relay, JB relay 4 (20A)

PINPOINT TEST R : THE PARKING, REAR AND LICENCE LAMPS ARE INOPERATIVE

Test Step

Result / Action to Take

R1

CHECK TAIL LAMP RELAY INPUT VOLTAGE

Disconnect: Tail lamp relay, JB relay 4.

Yes

Go to R2

Measure the voltage between tail lamp relay, JB relay 4, circuit 38G
(Y-R), harness side and ground.

No

Repair circuit 38G (Y-R).

Is the voltage greater than 10 volts?

Test the system for normal operation.

R2

CHECK CIRCUIT 14 (BR) FOR A SHORT TO GROUND

Measure the resistance between tail lamp relay, JB C-334 relay 4,

Yes

circuit 14E (BR), harness side and ground

Repair circuit 14 (BR)
Test the system for normal operation.

Is the resistance less than 5 ohms?

No

Go to R2

R3

CHECK CIRCUIT 14 (BR) FOR AN OPEN

Disconnect: RH Headlamp park lamp C-159.

Yes

Go to R4

Measure the resistance between tail lamp relay, JB C-334 relay 4,
circuit 14E (BR), harness side RH headlamp park lamp C-159, circuit

No

14D (BR), harness side.

Repair circuit 14 (BR).
Test the system for normal operation.

Is the resistance less than 5 ohms?

R4

CHECK CIRCUIT 175 (B-Y) FOR AN OPEN

Disconnect: Multifunction switch C-167.

Yes

Go to R5

Measure the resistance between tail lamp relay, JB C-331 relay 4,
circuit 175 (B-Y), harness side and Multifunction switch C-167, circuit

No

175 (B-Y), harness side

Repair circuit 175 (B-Y))
Test the system for normal operation.

Is the resistance less than 5 ohms?

R5

CHECK MULTIFUNCTION SWITCH

Perform the Multifunction switch testing in Section 211-05.

Yes

Replace the tail lamp relay.

Is the Multifunction switch functioning correctly?

Test the system for normal operation.

No

Replace the Multifunction switch, see Section
211-05.
Test the system for normal operation.

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417-01-41 Exterior

Lighting 417-01-41

DIAGNOSIS AND TESTING (Continued)

One or more parking, rear or license lamps

are inoperative

Possible causes:

Circuit 14 (BR) open or short to ground
Circuit 57 (B) open

PINPOINT TEST S : ONE OR MORE PARKING, REAR OR LICENCE LAMPS ARE INOPERATIVE

Test Step

Result / Action to Take

S1

CHECK TAIL LAMP RELAY INPUT VOLTAGE

Disconnect: Inoperative parking, rear or license lamp.

Yes

Repair circuit 57 (B).

Turn ON the parking lights.

Test the system for normal operation.

Measure the voltage between the inoperative lamp:

No

LH parking lamp C-160, circuit 14A (BR), harness side

Repair circuit 14 (BR).

RH parking lamp C-160, circuit 14D (BR), harness side

Test the system for normal operation.

Sedan LH tail lamp C-78, circuit 14A (BR), harness side
Sedan RH tail lamp C-77, circuit 14B (BR), harness side
Wagon LH tail lamp C-44, circuit 14A (BR) harness side
wagon right tail lamp C-45, circuit 14B (BR) harness side
Ute, non-SSB, LH rear lamp C-707, circuit 14B (BR)
harness side
Ute, non-SSB, RH rear lamp C-705, circuit 14D (BR)
harness side
Ute, SSB, LH rear lamp C-708, circuit 14B (BR) harness
side
Ute, SSB, RH rear lamp C-706, circuit 14D (BR) harness
side
License plate lamp C-81, circuit 14 (BR), harness sideand
ground

Is the voltage greater than 10 volts?

The parking, rear and license lamps are on

continuously

Possible causes:

Tail lamp relay
Circuit 175 (B-Y) short to ground
Multifunction switch C-167
Circuit 14 (BR) short to power

PINPOINT TEST T : THE PARKING, REAR AND LICENCE LAMPS ARE ON CONTINUOUSLY

Test Step

Result / Action to Take

T1

CHECK MULTIFUNCTION SWITCH

Disconnect: Multifunction switch C-167.

Yes

Go to T2

Are the parking, rear and license lamps illuminated?

No

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

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417-01-42 Exterior

Lighting 417-01-42

DIAGNOSIS AND TESTING (Continued)

Test Step

Result / Action to Take

T2

CHECK CIRCUIT 175 (B-Y) FOR A SHORT TO GROUND

Measure the resistance between Multifunction switch C-167, circuit

Yes

175 (B-Y), harness side and ground.

Repair circuit 175 (B-Y).
Test the system for normal operation.

Is the resistance less than 5 ohms?

No

Go to T3

T3

CHECK TAIL LAMP RELAY

Disconnect: Tail lamp relay, JB C-334 relay 4.

Yes

Repair circuit 14 (BR).

Are the parking, rear and license lamps illuminated?

Test the system for normal operation

No

Replace the tail lamp relay.
Test the system for normal operation.

Reverse Lamps
Connector Circuit Reference

C-12 Inhibitor switch and PRNDL switch

Pin Number(s)

Circuit Designation/Description

Normal Condition/Measurement

1

Circuit 140 (W-R)

0 voltage, less than 5 ohms between inhibitor

switch and PRNDL switch and ignition relay

2

Circuit 140X (R-B)

0 voltage, less than 5 ohms between inhibitor

switch and PRNDL switch, and reverse lamps

C-26 Reverse Lamp Switch

Pin Number(s)

Circuit Designation/Description

Normal Condition/Measurement

1

Circuit 140 (W-R)

0 voltage, less than 5 ohms between reverse

lamp switch and ignition relay

2

Circuit 140X (R-B)

0 voltage, less than 5 ohms between reverse

lamp switch and reverse lamps

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