Ford Falcon. Manual — part 367

417-01-7 Exterior

Lighting 417-01-7

DIAGNOSIS AND TESTING (Continued)

C-163 Power Distribution Box (PDB)

Pin Number(s)

Circuit Designation/Description

Normal Condition/Measurement

1

Circuit 18 (O)

0 voltage, less than 5 ohms between

Multifunction switch low beam

Multifunction switch and low beam headlamp

headlamp input

relay

2

Circuit 20 (G-R)

0 voltage, less than 5 ohms between

Multifunction switch high beam

Multifunction switch and high beam headlamp

headlamp input

relay

3

12B (G-O)

0 voltage, less than 5 ohms between RH high

RH high beam headlamp power

beam headlamp and high beam headlamp relay

input

4

Circuit 12G (G-O)

0 voltage, less than 5 ohms between RH low

LH High beam headlamp power

beam headlamp and low beam headlamp relay

input

5

13A (RG-B)

0 voltage, less than 5 ohms between LH high

RH low beam headlamp power

beam headlamp and high beam headlamp relay

input

6

13C (R-B)

0 voltage, less than 5 ohms between LH low

LH low beam headlamp power

beam headlamp and low beam headlamp relay

input

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417-01-8 Exterior

Lighting 417-01-8

DIAGNOSIS AND TESTING (Continued)

C-167 Multifunction Switch

Pin Number(s)

Circuit Designation/Description

Normal Condition/Measurement

1

Circuit 18 (O)

0 voltage, less than 5 ohms between

Multifunction switch low beam

Multifunction switch and low beam headlamp

headlamp input

relay

2

Circuit 20 (G-R)

0 voltage, less than 5 ohms between

Multifunction switch high beam

Multifunction switch and high beam headlamp

headlamp input

relay

3

Circuit 57CL (B)

0 voltage, less than 5 ohms between

Multifunction switch ground

Multifunction switch and chassis ground

Inspection and Verification

Visual Inspection Chart

Mechanical

Electrical

Multifunction switch

Power Distribution

Box (PDB):

fuse 15 (15A)
fuse 16 (15A)
fuse 24 (15A)
fuse 25 (15A)
relay 4 (40A)
relay 5 (40A)

Circuitry

Lamp bulbs

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417-01-9 Exterior

Lighting 417-01-9

DIAGNOSIS AND TESTING (Continued)

Symptom Chart

Condition

Source

Action

Battery

Both headlamps are inoperative

Go to PinPoint Test A

Circuitry
Multifunction switch C-167

PDB:

The low beams are inoperative

Go to PinPoint Test B

relay 5

Circuitry
Multifunction switch C-167

PDB:

The high beams are inoperative

Go to PinPoint Test C

relay 4

Circuitry
Multifunction switch C-167

PDB:

One low beam headlamp is inoperative

Go to PinPoint Test D

fuse 24 (15A)
fuse 25 (15A)

Circuitry
Headlamp bulb

One high beam headlamp is

PDB:

Go to PinPoint Test E

fuse 15 (15A)

inoperative

fuse 16 (15A)

Circuitry
Headlamp bulb

PDB:

The headlamps are on continuously

Go to PinPoint Test F

relay 4
relay 5

Circuitry
Multifunction switch C-167

Perform the Multifunction switch

The flash-to-pass feature is inoperative

Multifunction switch C-167

testing in Section 211-05.

Test the system for normal operation.

Pinpoint Tests

Both headlamps are inoperative

Possible causes:

Battery
Multifunction Switch C-167
Circuit 57CL (B) open

PINPOINT TEST A : BOTH HEADLAMPS ARE INOPERATIVE

Test Step

Result / Action to Take

A1

CHECK THE MULTIFUNCTION SWITCH GROUND

Disconnect: Multifunction switch C-167.

Yes

Perform the Multifunction switch testing in

Measure the resistance between Multifunction switch C-167, circuit

Section 211-05.

57CL (B), harness side and ground.

Test the system for normal operation.

Is the resistance less than 5 ohms?

No

Repair circuit 57CL (B).
Test the system for normal operation.

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417-01-10 Exterior

Lighting 417-01-10

DIAGNOSIS AND TESTING (Continued)

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

The low beams are inoperative

Possible causes:

Low beam headlamp relay
Circuit 18 (O) open
Multifunction Switch C-167

PINPOINT TEST B : THE LOW BEAMS ARE INOPERATIVE

Test Step

Result / Action to Take

B1

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

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

Yes

headlamp C-160.

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

Measure the resistance between RH low beam headlamp C-159,
circuit 13A (R-B), harness side or LH low beam headlamp C-160,

No

circuit 13C (R-B), harness side and ground.

Go to B2

Is the resistance less than 5 ohms?

B2

CHECK CIRCUIT 13 (R-B) FOR AN OPEN

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

Yes

Go to B3

Measure the resistance between RH low beam headlamp C-159,
circuit 13A (R-B), harness side or LH low beam headlamp C-160,

No

circuit 13C (R-B), harness side and low beam headlamp relay, PDB

Repair circuit 13 (R-B).

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

Test the system for normal operation.

Is the resistance less than 5 ohms?

B3

CHECK CIRCUIT 18 (O) FOR AN OPEN

Disconnect: Multifunction switch C-167.

Yes

Go to B4

Measure the resistance between the low beam headlamp relay, PDB
C-163 relay 5 (40A), circuit 18 (O), harness side and Multifunction

No

switch C-167, circuit 18 (O), harness side.

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

Is the resistance less than 5 ohms?

B4

CHECK THE MULTIFUNCTION SWITCH

Perform the Multifunction switch testing in Section 211-05.

Yes

Replace the low beam headlamp relay

Is the Multifunction switch operating correctly?

Test the system for normal operation

No

See Multifunction switch in Section 211-05.

Circuit 12 (G-O) open or short to ground

The high beams are inoperative

Possible causes:

Headlamp high beam relay
Circuit 20 (G-R) open
Multifunction Switch C-167

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