Question about 2000 Harley Davidson FLSTC Heritage Softail Classic

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Rear turn signal lights parially illuminate without using turn signals? Why??

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Posted on Sep 24, 2009

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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

Passenger side turn signal flashes faster but dont work even at day runing light, comes on when head lights are on, replace bulb and socket because was melted but stilldoes the same


Turn Signal Lamps
The turn signal lamps may only be activated with the ignition switch in RUN or BULB TEST position. The T/SIG fuse supplies ignition voltage to the turn signal switch. When the turn signal switch is placed in either the left or right position, the turn signal switch sends an ignition voltage to the hazard lamp/turn signal flasher, which sends an on-off signal to the turn signal switch. When the turn signal switch receives the on-off signal it will send that signal to the following lamps on the LH or RH side:
?€¢
The Rear Turn Lamp


?€¢
The Turn Signal Indicator


?€¢
The Sidemarker Lamp


?€¢
The Sideview Mirror (Pontiac Thunder only)

The turn signal switch also sends a separate on-off signal to the Daytime Running Lamps (DRL) control module, which relays the signal to the appropriate front turn signal. The front turn signals are grounded at G101 and G102. The rear turn signals are grounded at G401. The sidemarker lamps are grounded through the corresponding front parklamp.
The sideview mirror turn signals are a bank of LEDs placed behind the mirror glass.
The hazard lamps operate on battery voltage. The HAZARD fuse supplies battery voltage to the turn signal switch. When the hazard switch is pressed, the turn signal switch sends battery voltage to the hazard lamp/turn signal flasher, which sends an on-off signal to the turn signal switch. The turn signal switch send the on-off signal to all the turn signal lamps, causing all the lamps to flash including both IPC turn signal indicators. The hazard lamp/turn signal flasher is grounded at G200.
When the parklamps are ON, the sidemarker lamps receive voltage from the park lamp supply voltage circuit and illuminate. The sidemarker lamp is grounded through the corresponding rear turn signal. When the turn signal switch is place in the left or right hand position, the rear turn signal illuminates and the sidemarker lamp will loose its ground, causing the sidemarker lamp to turn off when the turn signals are on and to illuminate again when the turn signal is off.
Which blub an socket did you replace ? check the other blub ? The switch and or the flasher module can cause this problem .
Replace the turn signal switch. Refer to Multifunction, Turn Signal, and Hazard Switch Replacement - On Vehicle in Steering Wheel and Column.
Did you complete the replacement?

Which

Oct 11, 2015 | 2001 Pontiac Montana

1 Answer

2009 Impala rear lights not working


Turn Signal Lamps
The LT T/SIG and RT T/SIG fuses located in the underhood fuse block supplies battery positive voltage to the body control module (BCM) for turn signal and hazard lamp operation. When the turn signal switch is place in either the LEFT or RIGHT position, ground from G202 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. The BCM also sends a message via GMLAN to the instrument panel cluster (IPC) to cycle the turn signal indicator ON and OFF depending on the position of the turn signal switch.
Ground for the turn signal lamps is supplied as follows:
• G101 provides ground for the left front turn signal lamp
• G100 provides ground for the right front turn signal lamp
• G302 provides ground for the left and right rear turn signal lamps

The LT T/SIG and RT T/SIG fuses located in the underhood fuse block are also used by the body control module (BCM) for stop lamp operation.
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 both, 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 pedal is applied, the BCM will then apply battery voltage to the left and right stop 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 signals the transmission control module (TCM) and the engine control module (ECM) that the brakes are applied. Ground for all stop lamps is provided at G302.
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.

Did you check the fuse's. ? Wouldn't think it's a ground because right an left tail lamp Assembly's use same ground ! Did you check for B+ voltage at the bulb. with a volt meter ? Power is supplied by the BCM . Could be the tail lamp assembly

Jul 19, 2017 | Cars & Trucks

1 Answer

Is there a web site that will let me see the fuse locations and what each fuse does.


715b237.jpg Ford Taurus fuse block diagram
The standard fuse block. Fuses: 1 - a stoplight / a turning movement signal / the alarm signalling; 2 - a window wiper washer; 3 it is not used; 4 - front illumination, a parking light, a sound signal; 5 - the electronic block, the switch of heating of a rear screen, rear illumination; 6 - a washer and a rear screen wiper (versatile person), electric window regulators of radio and an illumination headlight; 7 - it is not used; 8 - hours, the tape recorder, internal illumination, the mirror electric drive; 9 - the defroster engine / the air air conditioner; 10 - a high beam; 11 - radio, a cassette tape recorder; 12 - ignitions, the relay of a sound signal and the sound signal; 13 - panel board illuminations; 14 it is not used; 15 - a stoplight, a lamp of illumination of number board and a body; 16 - memory devices of the block of devices; 17 - blocks of electronic devices, compressor clutches; 18 - precautionary light signals / a buzzer of seat belts.

Oct 27, 2010 | 1995 Ford Taurus

1 Answer

1995 ford windstar gl and only the top mount brake lamp is illuminating. Checked all fuses and bulbs and they are all ok. the rear lower 2 lamps illuminate when the lights are on, they just don't brighten...


Sounds like maybe a bad turn signal switch. If the brake and turn signal use the same bulb than the turn signal switch will interrupt the brake signal and supply a turn signal to the bulb. Usually you can wiggle the switch while holding the brake pedal down and get them to intermittently work. If that happens than for sure the switch has failed.

Sep 26, 2010 | 1995 Ford Windstar

1 Answer

1986 HD sportster 883 bought without turn signals. Located two wires on both forks and two single wires to rear signals. How do I wire led's? Tried and all 4 lights illuminate with either turn signal and...


Your bike came with front running lights (black wire) and turn signals. The wire color for the turn signals are gray wires. The grey turn signal wires have small rubber bands on them to indicate which side they are for. A brown tag indicates right turn signals and a violet tag indicates left turn signals. If you need a schematic, I have one but I cannot send it via this forum. This forum only allows for a 150Kb picture and the schematic is larger than that. I'll be glad to scan the schematic and send it to you if you'll contact me directly at wd4ity@bellsouth.net Remind me that you need a schematic for a 1986 Sporty.

Good Luck
Steve

Aug 31, 2010 | 1993 Harley Davidson XLH Sportster 883

1 Answer

Rear turn signal and hazard light don't flash (left side only)


The rear left turn signal bulb must be replaced immediatly before it melts the light socket, if it has'nt yet. Also please verify that the correct light bulb is being installed. because even though many bulbs look the same they are not identical. Installing the wrong bulb can be the begining of many, many problems in the particular circuit

Mar 26, 2010 | 2000 Ford Focus

1 Answer

The right rear turn signal blinks quickly in a


I believe this car has a rear bulb that has two fillaments, one for side lights the other shared for braking and flash. sounds like a blown bulb or a bad ground connection. Check the bulb and the bulb holder and ground connection.
Turn signal blinking quickly generally indicates a blown bulb front or rear or bad connection.

Dec 20, 2009 | 1993 Mercury Cougar

1 Answer

Signal Lights - flasher...


Hi it sounds like the multifuntion switch
never had one on a monte carlo before but lots of grand am and malibu
hope this helps

Mar 23, 2009 | 2002 Chevrolet Monte Carlo

1 Answer

Rear right turn signal and brake light will not function


More than likely, the problem is in the turn signal modual. The turn signal/cruise control/wiper/bright switch is all contained in the module in the steering column. Mine did similiar stuff a year ago.

Jan 26, 2009 | 2000 Cadillac Escalade

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