Question about 2007 Cadillac CTS 3.6L

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2007 CTS ? all lights operate correctly,,,NO Brake Lights when brakes applied,, BAS (Brake assist Sensor) is good ..???

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Posted on Jan 02, 2017

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SOURCE: Both brake lights are Out

your fuse panel will tell you the location of your brake lights. Haynes manual has much info than the owners manual rob1911.a1

Posted on Mar 15, 2010

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SOURCE: 2006 Cadillac CTS brake lights out but bulbs are fine

Take it to any local repair shop.

The ABS Relay,is for the system pump motor,nothing to do with lighting circuits.

Check brake switch !

Posted on May 15, 2010

  • 1 Answer

SOURCE: brake lights are not coming

fuse

Posted on Sep 08, 2010

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SOURCE: TC, ABS and Service brake assist lights are on after changing speed sensor.

make sure your sensor is aligned properly check your connections have you driven the car since you changed sometimes you need to drive the vehicle to reprogram the speed sensor into the abs circuit these are fused circuits check your fuses

Posted on Jul 07, 2012

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All brake lights and traction light Or on the dash and my brake lights will not work 2006 Cadillac CTS


The traction control system is part of ABS control module an if the light is on there is A DTC - diagnostic trouble code stored in the EBCM - electronic brake control module ! The brake pedal position sensor is an input to the EBCM , when you press the brake pedal the EBCM then energizes the BAS relay in the left rear fuse box turning on the brake lamps !
There could be a DTC like
DTC B3903
The electronic brake control module (EBCM) supplies voltage to the BAS 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 Descriptor
This diagnostic procedure supports the following DTC:
DTC B3903 Stop Lamp Relay Circuit
Or
DTC C0278
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
You may want to take this to the dealer !

Jul 14, 2015 | Cadillac Cars & Trucks

1 Answer

Where is the stop lamp or brake lamp fuse and panel for a 2007 cadillac cts?


Kevin , this is a very complex way of stoplamp control , I will post GM service Description and Operation of how they work an let you deside if you want to tackle this ! Do the center high mount brake lights work ?
The brake pedal position sensor is a resistive device used to sense the action of the driver's application of the brake pedal. The brake pedal position sensor provides an analog signal that will increase as the brake pedal is pressed.
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 bas relay close and battery positive voltage is applied through the bas 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.

There could be a code stored in the EBCM - electronic brake control module - DTC B3903 Stop Lamp Relay Circuit
DTC C0278 Brake Pedal Position Sensor Not Calibrated
there are several other codes that pertane to the brake lights . you could try Replaceing the bas relay !
Fuse Block - Left Rear
In the passenger compartment, under the left side of the rear seat at carpet.

Jun 28, 2015 | 2007 Cadillac CTS 3.6L

1 Answer

I have a 2000 Mercedes E430 base sedan. Last week I replaced the brake light switch because it was out and it solved the problem to the point that I can now put my car into gear and drive it, however, as...


Brake light switch problem may cause the ESP / BAS lights to illuminate.

Common symptoms of a bad
Mercedes brake light switch.
  • Car stuck in Park.
  • ABS ESP ETS lights come on.
  • Can not move the shifter from Park to Drive.
  • Brakes Defective Warning on Instrument Cluster
  • Car won't shift gears. Stuck in 2nd gear, limp mode.
  • Brake lights don't work. (Brake light switch can still be defective even if the brake lights work. Checking the brake light operation is not a good test.)
  • ESP, BAS, ABS lights turn on. Car won't shift properly. Stuck in gear.


TEST: To test your new brake light switch: Turn you car off to reset the ABS light. apply the parking brake. and start the car in neutral or park without using the brake. if the problem is the brake light switch... the light will only come on when you press the brake pedal.

If you replaced the brake light switch and the light is still on you should check a few other things such as:

  • Fuses and Relays
  • ABS pump
  • ABS wheel speed sensor
  • Brake Fluid Level
  • Get an advanced scanner to read trouble codes.


NOTE: ** You may need a MBZ scan tool to reset the error code which was stored in the ECU because of the bad brake light switch.

Feb 25, 2015 | 2000 Mercedes-Benz E-Class

1 Answer

Tc, abs and service brake assist lights are on


Could be a wiring problem or the object that triggers the sensor.

Jul 07, 2012 | 2004 Cadillac CTS

1 Answer

2004 Cadillac CTS break lights


Hello! There is a relay called the BAS relay (brake assist) that controls both the top brake light and the lower lights...Since the top light works the relay is doing its job...However, the relay output is connected to several White wires that carry the same voltage to all brake lights...One of those White wires (the one that carries voltage to the lower lights is open)...There is a Joint Connector located with the BAS relay in the Left rear fuse block...One White wire coming in from the relay contact and 3 White wires leaving...#1 to the top brake light...#2 left brake light and #3 right brake light...It would appear that the junction of #2 and #3 are open inside the Junction block...Not the easiest fault to find and fix...
If you have a multimeter I'll guide you through the process...Or you can take it to a wiring specialist...Wiring Junction blocks look like hair combs (multi-tooth metal combs that push into a connecter with several wires all the same color...In this instance WHITE WIRES...When someone depresses the brake pedal +12 volts must be on all three white wires...Send a comment...Guru...saailer

Dec 11, 2011 | Cars & Trucks

1 Answer

Hi, how are you? when the engine starts and after removing parking the ABS light sensor and the BAS light sensor goes on.. what does it mean ?


Hi there,

ABS: this is your Anti-lock Braking System.
BAS: this is your Brake Assist System.

The first thing I would suggest you check - press the brake pedal and confirm if your brake lights work. If not, then you have a faulty brake switch (on the brake pedal).

If lights DO work, then the next step is to have your Fault Codes read from your vehicle's computer - this step will identify which circuit/component has triggered these warning lights.

Note: It will take your local Dealership approx. 15mins to check these codes, so shouldn't cost much.


Cheers,



Jun 07, 2011 | Mercedes-Benz C-Class Cars & Trucks

2 Answers

No brake lights rear light only on on pass sideive changed one relay block but it still doesnt work


replace your stop light switch located up under the driver's side dash touching the brake pedal arm (lever)
it has a pin that comes out turning the brake lights on when you press on the brake.
the master brake cylinder returns the brake pedal when you release it; the stop light switch button is pushed in turning the brake lights off again. then: if there is another problem I will help you but, this is what you need to do first.

Jul 15, 2010 | 2004 Cadillac CTS

1 Answer

2006 cadillac CTS 2.8 v6. Two side brake lights went out


im replacing the BPP sensor on one now, Brake Pedal Position sensor

Jul 14, 2010 | 2006 Cadillac CTS

1 Answer

2006 Cadillac CTS brake lights out but bulbs are fine


Take it to any local repair shop.

The ABS Relay,is for the system pump motor,nothing to do with lighting circuits.

Check brake switch !

May 15, 2010 | 2006 Cadillac CTS

1 Answer

Mercedes Benz C180 Fault Message Brake Assist.Visit Workshop BAS


Hi there

BAS is the Brake Assist System and if there is a malfunction it would only come into play in an Emergency stop while applying full pressure. BAS applies full braking force because people tend to lighten up their pressure on the pedal in these situations. I would suggest that the best thing to do is go to a Workshop or Service Center and have it checked out. Please remember to put a good rating on my profile.

Kind regards
Dustin Ellse

Jun 03, 2008 | 2001 Mercedes-Benz C-Class

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