Question about 2005 Chevrolet Suburban 1500

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2005 Suburban brake signal light issue

2005 Suburban has brake signal issue. When brakes are applied, the right signal indicator and lights come on. If signaling right and the brakes are applied, the signal "stalls" on and stops flashing. All bulbs are good and all function normally until the brakes are on.

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  • Chevrolet Master
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Sounds like a faulty turn signal switch. The brake light wire is routed through the turn switch, so it appears the turn switch has gone crazy.

Posted on Dec 27, 2013

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Posted on Jan 02, 2017

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SOURCE: Signal and brake lights

Igot the same problem on left side.The problem was the convertor for the trailler plug.

Posted on Aug 13, 2008

  • 88 Answers

SOURCE: rear brake lights don't work

you prob got a trailer plug prob bad wires if not tail lights run through turn signal switch tell fix ya bout me ok

Posted on May 23, 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

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

2003 Chevy Silverado When I apply the brakes the


I had an issue like this one on a 2007 Colorado. I assume you mean the turn signal indicator inside the truck lights up. It was a bad bulb. think it was the turn signal bulb on the side that is lighting up. As for the gear indication being dim there is more than one bulb that lights them up and one may have blown. I hope this helps.

Jul 15, 2011 | 2003 Chevrolet Silverado 1500

1 Answer

I HAVE A 2005 SILVERADO AND WHEN I PUT ON MY SIGNAL LIGHTS RIGHT OR LEFT SIDE BOTH SIDES FLASH VERY DIM AT THE SAME TIME. IF I APPLY THE BRAKE WHILE THE SIGNAL LIGHTS ARE ON THE LIGHTS ALL GO OUT AND STOP...


More than likely a bad ground in the wiring harness's. Have you changed your transmission, Alternator, or starter? Or added a trailer plug on the bumper?

Jun 20, 2011 | 2005 Chevrolet Silverado

1 Answer

1999 GMC Suburban, K1500 4WD. Top brake light bar


third light is different circuit. saftey reason check fuses grounds wires

Oct 10, 2009 | 1999 GMC Suburban

1 Answer

LEFT BRAKE LIGHT AND TURN SIGNAL LIGHT INDICATOR


Replace both sides with correct dual element bulbs which may be the culprit here

Sep 27, 2009 | 2005 Audi A6

1 Answer

Occasionally the right turn signal light turns on when braking


Sound's like their is a problem with the right hand rear light cluster.The reason it only happen's going down a hill is you applying the brake. The only place the brake and indicator light's come together is the rear clusted. To check this apply the hand brake gently with the button held in instead of useing the foot brake. This may not be the fault but it is worth a try as it seems the most likely problem.

Aug 21, 2009 | 2008 Toyota Sienna

1 Answer

Turn signals blinking fast and stop when brakes applied


likely not, but change /check anyhow....If problem persists, likely you will need to change the module that controls directionals (usually under dash to the right of steering column)

Apr 26, 2009 | 2005 Jeep Grand Cherokee

2 Answers

Signal and brake lights


Igot the same problem on left side.The problem was the convertor for the trailler plug.

Jul 16, 2008 | 2005 Chevrolet Colorado

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