Turn signals not working

Turn Signals
When the multifunction switch is placed in the LH or RH TURN position, voltage is routed to the turn lamps. The lighting control module (LCM) flashes the turn lamps at approximately 80 times per minute if both the front and rear turn lamps operate correctly. If only an individual turn signal lamp operates, the LCM flashes the remaining turn lamp approximately 160 times per minute.

1. Verify the customer concern.

1. Visually inspect the following for obvious signs of mechanical or electrical damage.

Visual Inspection Chart Mechanical Electrical

• Multifunction switch

• Central junction box (CJB) fuse(s):
  • 16 (15A) (turn signal lamps)
  • 31 (15A) (hazard lamps)
• Circuitry
• Bulbs
• Lighting control module (LCM)

make sure that all of your turn signal bulbs are not blown they run through each other so you know when one gets blown.

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The first place to start are fuses, check your owners manual for location, typically left side of dash.

The emergency (hazard) flashers and turn signals are on separate fuses and run through the hazard switch. If all the lights work when the hazard switch is on then the problem will likely be a blown turn signal fuse.

Other possibilities are the hazard switch itself is bad, the turn signal switch is bad or a broken wire, all of which require a meter (or test light) wiring diagram and knowledge of the circuit to test it - better to have it done.

Robert Grove
Mobile Mechanic Malibu 310 651 8020 Auto Truck RV Mobile Repair...

check your flasher relay

you must replace the multi fuction switch! also known as the turn signal switch! its common on ford crown vic!

Sounds like a bad lighting control module. They were very problematic for '03.

well makes no sense turnsignals are on ignition switch fed fuse and brake lights are on 24 hour fuse.. to me sounds like bad turn switch... it handles turn signals also hazzards. and brake lights have to go through the turn switch also... it is common problem.. combination switch is what they call it.. not hard to replace either....let me know

have the multifunction switch checked and the flasher.

Sounds like a multifunction switch, work the emergency flasher button up and down a few times, then attempt to work the turn signals if the signals work then you will need a multifunction switch.

it may be turn signal switch or fuse its under the dash with your fuse change it the cost is less than $5.00 bucks try it.