Section 01-12: Instrument Panel and Console
1994 Mustang Workshop Manual
DIAGNOSIS AND TESTING

Pinpoint Test

 

PINPOINT TEST A: CIGAR LIGHTER INOPERATIVE

 

A1 CHECK FUSE  

Yes
GO to A4.

No
GO to A2.

 

A2 CHECK SYSTEM

Yes
GO to A3.

No
GO to A4.

 

A3 CHECK FOR SHORT TO GROUND

  • Ignition switch OFF.
  • Remove the 20A CIGAR fuse.
  • Disconnect cigar lighter connector.
  • Measure the resistance of LB/W wire between RH terminal of 20A CIGAR fuse holder and ground.
  • Is resistance less than 5 ohms?
Yes
SERVICE LB/W wire between instrument panel fuse junction panel and cigar lighter knob and element .

No
REPLACE 20A CIGAR fuse. GO to A4.

 

A4 CHECK POWER SUPPLY TO CIGAR LIGHTER

  • Ignition switch OFF.
  • Disconnect cigar lighter connector.
  • Ignition switch in RUN or ACC.
  • Measure the voltage of the LB/W wire at the cigar lighter connector.
  • Is voltage greater than 10 volts?
Yes
GO to A5.

No
SERVICE LB/W wire between instrument panel fuse junction panel and cigar lighter knob and element .

 

A5 CHECK CIGAR LIGHTER GROUND

  • Ignition switch OFF.
  • Disconnect cigar lighter connector.
  • Measure the resistance of the BK wire between the cigar lighter connector and ground.
  • Is resistance less than 5 ohms?
Yes
REPLACE cigar lighter knob and element .

No
SERVICE BK wire between cigar lighter knob and element and ground.