Headlight Switch

Remove headlight switch. Check continuity or resistance between appropriate terminals with switch in specified position. See HEADLIGHT SWITCH TEST table. See Fig 1 . If continuity or resistance is not as specified, replace headlight switch.

HEADLIGHT SWITCH TEST

Switch Position

Between Terminals No.

Continuity

Autolamp Feed Circuit

Off

4 & 17

Park

4 & 17

Head

9 & 17

Autolamp On/Off Circuit

Off

4 & 17

Off

4 & 16

⁽¹⁾

4 & 17

Yes

4 & 16

⁽²⁾

Instrument Cluster Illumination Circuit

⁽³⁾

Dome Light Circuit

Off

4 & 12

Yes

Headlight Circuit

Off

6 & 7

Park

6 & 7

Head

6 & 7

Yes

Parking Lights Circuit

Off

13 & 14

Park

13 & 14

Yes

Head

13 & 14

Yes

Warning Chime Circuit

Off

10 & 11

Park

10 & 11

Yes

Head

10 & 11

Yes

⁽¹⁾	Resistance should be 3.4-3.7 k/ohms.

⁽²⁾	Resistance should be 193-214 k/ohms.

⁽³⁾	Resistance should smoothly decrease as thumbwheel is rotated from up to down positions.

Fig 1: Identifying Headlight Switch Terminals

Courtesy of FORD MOTOR CO.