Question about 2003 Ford Crown Victoria

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Third brake light works but side brake lights do not backup lights,signals, and parking lights all work have checked fuse, relays, even brake pedal switch all good and even checked all bulbs and grounding please help with this problem.

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Turn signal swith is bad , just replaced our to solve problem

Posted on Feb 23, 2009

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I would still guess at faulty brake light switch. Some newer cars have several circuits built into the lamp switch. One could have failed.

Posted on Dec 26, 2008

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2007 Cadillac CTS No Brake Lights In Iluding The Third Brake Light


Is the EBCM energizing the BAS relay to turn on the brake lights ?
The brake pedal position sensor receives both a 5-volt reference voltage and a low reference signal from the electronic brake control module (EBCM). When the brake pedal is pressed, a variable signal is applied from the brake pedal position sensor to the EBCM through the brake sensor signal circuit. The fuse block left rear supplies battery positive voltage to the bass relay switch through the BASS fuse. One side of the bass relay coil is permanently grounded at G402. The EBCM supplies voltage to the bass relay coil upon receiving the signal from the brake pedal position sensor. The switch contacts of the bass relay close and battery positive voltage is applied through the bass relay switch to the center high mounted stop lamp (CHMSL), and to the turn signal/hazard flasher module through the stop lamp switch signal circuit. The ground for the CHMSL is applied from G402. The turn signal/hazard flasher module then supplies voltage to the left and right stop lamps in the tail lamp assemblies that have ground at G401 and G402. For export vehicles the stop lamps receive battery positive voltage directly from the bass relay.

Did you have a qualified repair shop check for DTC'S - diagnostic trouble codes ?
DTC B3903 Stop Lamp Relay Circuit
The electronic brake control module (EBCM) supplies voltage to the BASS relay coil side voltage supply circuit when the stop lamps are active. The coil side control circuit of the BASS relay is permanently grounded at G402.

DTC C0278 Brake Pedal Position Sensor Not Calibrated
The brake pedal position sensor (BPP) is a potentiometer. The electronic brake control module (EBCM) supplies a 5-volt reference circuit and low reference circuit to the BPP sensor. The BPP sensor signal circuit is a direct input to the EBCM. The EBCM determines the BPP based on the voltage from the BPP sensor. The EBCM converts the BPP sensor feed back voltage to a digital signal and puts it on the class 2 communication bus.

DTC C0282 Brake Pedal Position Sensor Circuit Range/Performance
DTC C0283 Brake Pedal Position Sensor Circuit Low
DTC C0284 Brake Pedal Position Sensor Circuit High
DTC C0880 Device Voltage Reference Output 2 Circuit

Without knowing if any of these DTC'S are stored do not know what diagnostic direction to point you in .

Mar 21, 2018 | Cadillac Cars & Trucks

2 Answers

I have a 2001 Kia Sportage and replaced the brake light switch. I have no brake lights when you mash the brake pedal but the tail lights work otherwise when put in park. What am I overlooking?


If the third brake light is working and just the two mains are not then it may be the turn signal switch that is the culprit here, the brake light circuits go through the switch.

Nov 18, 2016 | Kia Cars & Trucks

1 Answer

95 mustange gt brake light dont work check #9 fuses change all bulbs replaced switch on brake pedal hazards lights works ,parking or running lights works,turning signal lights works,what other places i...


I assume the fuse has power if the hazards work.
The third brake light skips the turn signal switch, the regular brake light circuit goes thru the turn signal switch.
Do you have power going into the turn signal switch on the red lite green wire from the brake switch ?

Feb 17, 2013 | 1995 Ford Mustang

1 Answer

I own a 2001 dodge dakota 4x4, my brake lights wont work, I have park lights, turn signals, back up lights, even 4 way flashers, I replaced the brake unit on the brake pedal, and checked all fuses, they...


Hi,

When you say you checked the fuse, was this just a visual check....or did you try replacing the fuse the a new one? Sometimes a visual check doesn't show minute breaks in the fuse wire, which gives a false appearance that the fuse is fine.

When the fuse is ok, this problem normally relates to the brake switch (mounted to the brake pedal). When this switch is replaced, you should always use a multimeter and check the switch is operating correctly when touching the brake pedal.

If the switch is ok, then suspect a faulty relay (if applicable to the Dakota).


Cheers,

May 14, 2011 | Dodge Dakota Cars & Trucks

2 Answers

Rear turn signals and brake lights out. Front signals and rear tail lights work fine.


the brake lights and the rear turn signals should be the same bulb check the bulbs to make sure they are not blown does your third brake light work if all brake light are out and the bulbs are good check the brake light switch on the brake pedal

Nov 04, 2009 | 1986 GMC C1500

3 Answers

Brake lights not working


Not even the third eye? then the fuse is blown or all the bulbs are out or the brake light switch on the break pedal is bad wire off or broken( it breaks right off the plug then crosses then blows the fuse as the loose broken wire hits the brake pedel arm. Test the break pedal switch first if the third eye doesesnt work either. no power with a test light the fuse is blown or the wire broke ( the wire goes straight to the switch from the fuse and doesnt go anywhere elese. the other wire if hot should light the lights. Most of these wont come out of park without this working as the wire also turns on the park release but some Fords the park release sticks released and Ford made em that way as they didnt like the brake to get out of park law. If the brake lights dont work maybe you ought not be able to get out of park anyway till its fixed. the switch is hot on both wires with the switch pused down and the lights dont still work go after the third eye first if the bulbs are bad change em before you do the rest of the work. on cars with yellow turn signals the brake lights all work on the same wire but red only use three wires, but you didnt say the turn signales didnt work if they work and they are red you r on the way to the turn signal switch as the brake switch powers the turn switch with power then it splites it fot the two lights and adifferent switch circuit for the front hooks them all together for hazard. yellow turns in the back or even separt bulbs can mean blown bulbs ther too its old enought for all the bulbs to fail and the runs still work.

Aug 14, 2009 | 1999 Ford Explorer

1 Answer

No brake lights


It is not the brake switch as the third light works. If the lights work when the hazard lights are on then it is the turn signal switch. If not then I would check the bulbs and then the relay and fuses.

Jun 21, 2009 | 1997 Oldsmobile Cutlass

1 Answer

All brake lights suddenly stopped working changed bulbs park light fuse and cant find any blown fuses what else can it be


brake switch on the pedal bad.bad relay. do you have a second fuse box if so check it. look at the wiring see if it is frayed or chafed check the connections.check all the fuses not just the ones labeled brakes.switch the relay with one that you know is good like turn signal and see if the turn signal works then check brakes.use a 12 volt test light check the brake switch and probe the wires. hope this helped if not write back and i'll give you more ideas.

Apr 24, 2009 | 1996 Buick Park Avenue

2 Answers

1994 Buick Regal Grand Sport: Brake light in the window works fine. The 4 bulbs with two filaments in the tail-light housings do not become brighter though. The parking lights work. The signals/hazards...


i had the same problem had to replace the turn signal switch....GM for some reason wired the brake lights through the turn signal switch. to check if this is the case with yours. put some pressure on the turn signal lever as if you were going to turn on your brights and press your brake pedal and see if the lights work at that point that is how i found mine. hope this helps. if indeed they work with pressure on the turn signal lever. the new switch cost me $60 at autozone and that is with the steering wheel radio controls, make sure you get the proper switch should be part# sw771 if you have the radio controls on steering wheel and you will need a steering wheel puller and lock plate compressing tool.

Mar 31, 2009 | 1994 Buick Regal Gran Sport

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