Question about Harley Davidson FLSTF Fat boy Motorcycles

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No tail lights. Brake light works when brakes are applied. Both turn signals flash when you select right or left.

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First, remove and check the bulb. If the bulb is good, use a test light to test for voltage to the socket. You should have voltage on both contacts if you have someone hold the rear brake down. If not, check the "lights" fuse if you bike is equipped with one. If you still don't have any power to the tail light, you'll have to trace the wiring back through the fender.

Ride Safe.
Steve

Posted on Jan 03, 2011

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Posted on Jan 02, 2017

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08 Buick lucerne cxl. Third brake light works as well as front signal lights. No rear brake lights or turn signals. Tail lights and headlights and third brake lights works. Bulbs good. Help


Stop Lamps
The brake pedal position sensor is used to sense the action of the driver application of the brake pedal. The body control module (BCM) provides a 5-volt reference voltage and low reference to the brake pedal position sensor. The position sensor provides an analog voltage signal back to the BCM that will increase as the brake pedal is applied. When the brake is applied, the BCM will then apply battery voltage to the left and right stop/turn signal lamp supply voltage circuits and the center high mounted stop lamp (CHMSL) supply voltage circuit illuminating the stop lamps. At the same time the BCM applies battery voltage through the signal circuit to the transmission control module (TCM) and the engine control module (ECM) indicating that the brakes are applied.
Ground for the stop lamps is supplied as follows:
• G402 provides ground for the left rear stop/tail/turn signal lamps
• G403 provides ground for the right rear stop/tail/turn signal lamps
• G301 provides ground for the CHMSL
The stop lamps on this vehicle will not illuminate unless the ignition is in the accessory, run, or crank positions. When the ignition is in the OFF position the stop lamps will not illuminate when the brake pedal is applied.
Battery voltage from the LT TRN/SIG and RT TRN/SIG fuses located in the rear fuse block is also used by the body control module (BCM) for stop lamp operation.

Turn Signal Lamps
Battery voltage supplied to the body control module (BCM) from the fuses listed below is used for turn signal and hazard lamp operation.
• LT TRN/SIG fuse for the left turn signals
• CTSY/RF TRN fuse for the right front turn signal
• RR TRN/SIG fuse for the right rear turn signal
When the turn signal switch is place in either the LEFT or RIGHT position, ground from G300 is applied through the turn signal switch signal circuit to the BCM indicating the turn signal request. In response to this signal, the BCM applies a pulsating voltage to the front and rear turn signal lamps supply voltage circuits cycling the lamps ON and OFF. At the same time the BCM sends a GMLAN serial data message to the instrument panel cluster (IPC) to cycle the appropriate turn signal indicator ON and OFF.
Ground for the turn signal lamps is supplied as follows:
• G104 provides ground for the left and right front turn signal lamps
• G402 provides ground for the left rear stop/tail/turn signal lamps
• G403 provides ground for the right rear stop/tail/turn signal lamps

Do you have a factory scan tool (tech2) ? Your best bet , take it to the dealer .

Sep 08, 2017 | Buick Cars & Trucks

1 Answer

On 2003 Kia Sedona, when there is moisture outside like rain or snow the signal lights don't work Properly. When apply brake right signal light comes on and does not blink, when turn on left signa


sounds like you are getting water into the connections and possibly have a bad earth connection. Suggest you check all light connections for water ingression.

Aug 11, 2017 | 2003 Kia Sedona

1 Answer

Rear hazard flashers don't work 1994 Chevrolet Cavalier


Hazard flasher power comes from the 20A S/LP fuse in the fuse block. It is applied to the hazard flasher in the convenience center. Flasher output is applied to the turn/hazard/headlight SWITCH assembly where activation of the HAZARD switch causes flashing power to be applied to the turn indicators and the turn filaments of the front and rear dual park/turn lights. If replacing the fuse doesn't work, trace the power through the circuit. Check for misssing/disconnected ground wires.

Sep 16, 2012 | Chevrolet Vehicle Parts & Accessories

2 Answers

2007 chevy impala brake light and left turn signal not working


Fast flashing dash signals mean there is a bulb issue-DEFINATELY!

Aug 07, 2012 | 2007 Chevrolet Impala LS Sedan New Cars

1 Answer

Running lights work but no blinkers or brake lights. Changed fuses and bulbs no luck


I'm inclined to believe it is the turn signal switch. When you select left or right, the brake light is removed from that side, and the flasher is connected to the bulb instead, making the brake light on that side flash as the indication that you plan to turn. You have lost everything, but the simple answers check out.

If you have lost signals, brake lights and tail lights, then it is more likely that the ground supplied to the bulbs is not working, since the tail lights share noting in common with the brakes lights and turn signals but ground.

If the tail lights work, the fact that the brake lights and rear turn signals share that switch starts to look meaningful — even more so if the front turn signals also don't work. But the front signals and the rear signals use different circuitry in the switch, so it would be something more mechanical in the switch than electrical in that case.

Jun 24, 2010 | 1991 Buick Regal

3 Answers

Trailer lights have two wire out of each fixture left turn goes on left side Right hand turn goes on the other side Tail lights connect how and brakes connect how?


One wire is for the brake/directional filament and the other wire is for the tail light. The fixture should be grounded when it is attached to the bracket. To test which is which (the brown wire is USUALLY the ail light) make sure the fixture is grounded and touch a hot wire to each of the wires coming from the fixture. Watch to see which wire lights up the brighter filament and this is the brake/directional light. The dimmer filament if the tail light. Brakes lights and directional lights are both the same filament. Wen the brakes are applied, both lights are activated. When a direction light is turned on, it simply flashes the brake light filament.

Apr 04, 2010 | 2007 GMC Sierra 3500HD

1 Answer

Left signal flashes right doesnot signals wont light up for night


Replace the bulb in the tail light. It's dual filament bulb. Brake light is separate from the running light.

Apr 24, 2009 | 2005 Harley Davidson XL 1200 C Sportster...

1 Answer

96 Ford Contour - The Classic Rear Brake lights don't work...


no disrespect but....
Check the book and make sure you are using the proper bulbs on all sides. (3957 looks just like 3956 but wont work right)

Jan 23, 2009 | 1996 Ford Contour

1 Answer

Left brake lite doesn't work AND the tail lite goes off


Hi Ahunley, Sounds like you have cross the connection wires to the unit ( positive to earth & earth to positive) Try swapping the connectors over.

Hope this works.
kind regards
David

Oct 09, 2017 | 1993 Cadillac Fleetwood

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