Question about 2002 Jeep Liberty

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Lighting problem Push on the brake pedal and left aft turn signal light illuminates???

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If the wiring on your Liberty hasn't been messed with, the brake light on the left aft side may have been replaced with the wrong one. You may want to double-check to make sure this isn't the case or simply purchase a new one. Also check the bulb socket to make sure there isn't a stray piece of metal in there, causing BOTH bulb filaments to turn on when the brake is depressed.

I hope this helps to solve your problem! :)

Posted on May 03, 2010

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Posted on Jan 02, 2017

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2002 Astro brake lights stuck on


Chevy has a different circuit for the brake-lights. Strange that the brake-lights don't go out, after the fuse and/or relay is removed. Unplug the brake-light switch. Are the brake-lights out now? The brake-light circuit travels through the turn signal switch. There could be a failure inside the turn signal switch or there could be a short in the circuit, causing the brake-lights to stay on. You can try removing fuses that have to do with protecting the turn signal and hazard flasher circuit. If this allows the brake lights to go out then I think you will have narrowed it down. What other tests have you run? Have you removed and inspected the lighting in the rear? Do you have a trailer hitch? I ask because in some applications, there can be a 12volt power source. If the power wire shorts against the brake-light wire, you can have this fault. Please let me know if this helps and feel free to write back with any questions. Be as detailed as you can. You are the eyes and ears of this subject, good luck.

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-Bulb is good...?
-If so check the push in (On/Off switch) Just above the brake pedal arm. It might be stuck. If it's not stuck, replace new one.

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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

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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.

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2 Answers

1992 lincol town car,no rear lights or brake lites, only turn signal and hazard lights work, front lights fine. And about the same time instrument cluster light went out.


The Park Lamps and Instrument Panel illumination lamps are controlled by the lighting control module. The problem could be either the headlamp switch or the Lighting control module. Most likely, the head lamp switch.
The most likely cause of the brake lamps not working would be a failed Brake Pedal Position (BPP) switch. It could also be caused by the multifunction switch. To find out if it is the BPP, check for power at the BPP switch. One terminal has a Light Green and Red (LG/R) wire and the other has a Plain Light Green (LT GN) wire. The LG/R wire should be hot at all times. The LT GN wire should be hot only when the pedal is pressed down.

If there is no power at all, there is probably a blown fuse at fuse #10 (20 Amp) in the Central Junction Box (CJB) located uder the left side of the dash. If this fuse is blown, you have a short circuit between the CJB and the BPP switch.

If there is power only on the LG/R wire even with the pedal pressed, then replace the BPP switch.

If there is power on both sides of the BPP then check fuses #20 (7.5 Amp) and #22 (20 Amp) also locatedin the CJB.

If fuse #20 is blown, you have a short between the BPP and the Lighting Control Module. If fuse #22 is blown, you could have a short anywhere from the BPP through the Multifunction Switch all the way back to the brake lamps themselves.

The Brake lamps, Turn Signals, and Park Lamps all share the same ground, so if the Turn Signals are working, it is not likely a ground problem.

Please also review this article: Where's The Fuse?

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2 Answers

When headlight are on and hit the beake pedal only the 3rd brake light comes on the rest are stuck . When i release brake pedal it seems like i am driving with my brake light on . but my headlight off...


It may sound silly, but check your brake light bulbs to see if they have been installed incorrectly. Brake light bulbs have two filaments, one for tail light, and a brighter one for brake lights. On some cars if the bulb is installed wrong, the brighter filament will stay on for tail lights. The only other thing I can think of is the wrong bulbs have been installed.

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I have a Chevy 2500 4X4 with brake lights not working. I have all other lights working. I only have one brake light working when I turn on the right turn signal then my left brake light will work. What's...


What year?

Sounds like a turn signal switch. Earlier models would use the same bulb for the brake and turn signal. The turn signal switch will interrupt power to the brake light and route the signal to either the left or right bulb depending on with way you where turning. Usually you can wiggle the turn signal switch and get the brake light to work momentarily when this is the problem.

Newer vehicles use a lighting module that looks for inputs from the turn signal switch and brake pedal switch and then decides where to send power. This module is also know to go bad.

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its your blinker box.. all major lights run through there

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