Section 17-01: Lighting, Exterior
1996 F-150, F-250, F-350, F-Super Duty Motorhome and Bronco Workshop Manual
DIAGNOSIS AND TESTING

Component Tests, Headlamps

 

NOTE: Use Rotunda 73 Digital Multimeter 105-R0051 or equivalent when performing the following component test.

 

Headlamp Switch

The component connector MUST BE REMOVED before testing. To test a single circuit within the component, select that circuit under the column TO TEST. To test the complete component, perform all tests.

Connect the tester to the terminals shown in the second column and operate the component as shown in the third column.

To TestConnect Self-Powered Test Lamp or Ohmmeter to TerminalsMove Switch to These PositionsA Good Switch Will Indicate
Headlamp CircuitPin B1, Circuit 38 (BK/O)
and
Pin H, Circuit 15 (R/Y)
Off
Park
Head
Open Circuit
Open Circuit
Closed Circuit
Park Lamp CircuitPin B2, Circuit 195 (T/W)
and
Pin R, Circuit 14 (BR)
Off
Park
Head
Open Circuit
Closed Circuit
Closed Circuit
Dome Light CircuitPin D1, Circuit 54 (LG/Y)
and
Pin D2, Circuit 55 (BK/PK)
Pin D2, Circuit 706 (GY)
Knob rotated fully counterclockwise
(In detent)
Closed Circuit
  Knob rotated fully clockwise
(Out of detent)
Open Circuit
Panel Light Dimmer CircuitPin R, Circuit 14 (BR)
and
Pin I, Circuit 294 (W/LB)
Knob rotated left from full clockwise positionOhmmeter Will Show Smoothly Increasing Resistance to approx. 11 ohm max.
Ignition On, Lamps Off CircuitPin IGN, Circuit 137 (Y/BK)
and
Pin DN, Circuit 484 (O/BK)
Off
Park
Head
Closed Circuit
Open Circuit
Open Circuit
Cluster Dimmer CircuitPin I, Circuit 294 (W/LB)
and
Pin DN, Circuit 484 (O/BK)
Off
Park
Head
Open Circuit
Closed Circuit
Closed Circuit

 

Circuit Common Point

Refer to Section 18-01.

 

Headlamps ON Warning Chime/Buzzer

Refer to Section 13-09.