Section 01-12: Instrument Panel and Console
1996 F-150, F-250, F-350, F-Super Duty and Bronco Workshop Manual
DIAGNOSIS AND TESTING

Pinpoint Test

 

PINPOINT TEST A: CIGAR LIGHTER INOPERATIVE

 

A1 CHECK FUSE

Is fuse OK?
YesNo
GO to A4.GO to A2.
 

A2 CHECK SYSTEM

Does fuse fail again?
YesNo
GO to A3.GO to A4.
 

A3 CHECK FOR SHORT TO GROUND

Is resistance less than 5 ohms?
YesNo
SERVICE Circuit 40 (LB/W) wire between instrument panel, IP fuse panel and cigar lighter knob and element.REPLACE 15A CIGAR fuse 16. GO to A4.
 

A4 CHECK POWER SUPPLY TO CIGAR LIGHTER

Is voltage greater than 10 volts?
YesNo
GO to A5.SERVICE Circuit 40 (LB/W) wire between instrument panel, IP fuse panel and cigar lighter knob and element.
 

A5 CHECK CIGAR LIGHTER GROUND

Is resistance less than 5 ohms?
YesNo
REPLACE cigar lighter knob and element.SERVICE Circuit 57 (BK) wire between cigar lighter knob and element and ground.
 

PINPOINT TEST B: POWER POINT INOPERATIVE

 

B1 CHECK FUSE

Is fuse OK?
YesNo
GO to B4.GO to B2.
 

B2 CHECK SYSTEM

Does fuse fail again?
YesNo
GO to B3.GO to B4.
 

B3 CHECK FOR SHORT TO GROUND

Is resistance less than 5 ohms?
YesNo
SERVICE Circuit 964 (DB/LG) wire between instrument panel, IP fuse panel and power point.REPLACE 25A POWER POINT fuse 9. GO to B4.
 

B4 CHECK POWER SUPPLY TO POWER POINT

Is voltage greater than 10 volts?
YesNo
SERVICE Circuit 964 (DB/LG) wire between instrument panel, IP fuse panel and power point.SERVICE Circuit 57 (BK) wire between power point and ground.