CB - Turn Signal Lamps/Hazard Flasher Lamps Inoperative

Pinpoint Test CB: Turn Signal Lamps/Hazard Flasher Lamps Inoperative

NOTE: Ford DOES NOT provide a procedure to perform the following pinpoint test without the Rotunda New Generation Star (NGS) tester 007-00500 or equivalent.

CB1 - Test Turn Signals

- Turn ignition switch to RUN.
- Test both left and right turn signals.

Do turn signals flash at a normal rate?

YES System operating normally.
NO GO to CB2.

CB2 - Test Flasher Operation

- Turn ignition switch to RUN.
- Test both left and right turn signals.

Does one (or both) turn signals flash at a fast rate?

YES REPLACE damaged bulbs. If condition still exists, SERVICE circuit 9 (LG/O), 5 (O/LB), 3 (LG/W), 2 (W/LB) from multi-function switch to bulb and ground socket.
NO GO to CB3.

CB3 - Test Individual Flashers

- Turn ignition switch to RUN.
- Test both left and right turn signals.

Does only one side flash?

YES SERVICE multi-function switch.
NO GO to CB4.

CB4 - Test Flashers

- Turn ignition switch to RUN.
- Test both left and right turn signals.

Do both sides fail to flash?

YES CHECK fuse 1 (15A) Town Car or fuse 5 (15A) Crown Victoria, Grand Marquis. Fuse should have power in RUN. If fuse is good, GO to CB6.
NO GO to CB5.


CB5 - Test Flasher Power

- Connect Rotunda New Generation Star Tester 007-00500 or equivalent to data link connector
- With ignition switch in RUN, read PID FLSHPWR.

Does PID indicate flasher power?

YES GO to CB4.
NO GO to CB3.

CB6 - Test Hazard Power-Switch On

- Turn hazard switch ON.
- Use Rotunda New Generation Star (NGS) Tester to read PID FLSHPWR.

Does PID indicate flasher power?

YES SERVICE circuit 385 (W/R) from multi-function switch to lighting control module. GO to CB7.
NO SERVICE open in circuit 298 (P/O) from fuse junction panel to multi-function switch or multi-function switch. RETEST system.

CB7 - Test Flasher Output

- Remove lighting control module connector C3.
- Using a jumper wire, short pin C3-13 to pin C3-15.
- Turn hazard switch on.

Are any of the turn signal bulbs illuminated?

YES REPLACE lighting control module. RETEST system.
NO GO to CB8.

CB8 - Isolate Lighting Control Module

- Remove lighting control module connector C3.
- Turn on hazard flashers.

Do any of the bulbs illuminate?


YES SERVICE Circuit 44 (LB) from lighting control module to multi-function switch for short to B+. RETEST system.
NO GO to CB9.

CB9 - Test Hazard Flashers

- Turn hazard flashers on.

Do hazard flashers work?

YES System operating normally.
NO CHECK fuse 16 (15A) Town Car or fuse 1 (15A) Crown Grand Marquis. If fuse is good, GO to CB10.

CB1O - Test PID Power

- Connect Rotunda New Generation Star Tester 007-00500 or equivalent to data link connector.
- With hazard switch on, read PID FLSHPWR.

Does PID indicate flasher power?

YES GO to CB12.
NO Go to CB11.

CB11 - Test Hazard Power-Switch Off

- Turn hazard switch off.
- Turn ignition switch to RUN.
- Read PID FLSHPWR.

Does PID indicate flasher power?

YES SERVICE Circuit 10 (LG/R) from fuse junction panel to multi-function switch. RETEST system.
NO SERVICE Circuit 385 (W/R) from multi-function switch to lighting control module. RETEST system.

CB12 - Bypass Lighting Control Module

- Remove lighting control module connectors.
- Using a jumper wire, short pin C3-13 to pin C1-11.
- Turn hazard switch on.

Are any of the turn signal bulbs illuminated?

YES REPLACE lighting control module. RETEST system.
NO SERVICE Circuit 44 (LB) from lighting control module to multi-function switch. RETEST system.