Question about Chevrolet Monte Carlo

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I have a 98 monte carlo, the brakes lock up .only on left front,i got new front calipers.change the brake line,and put a nre abs speed sensor,,,,so please can you tell me what would be the problem

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I am unsure if the brake lines are one piece or consist of rubber line and metal ones. If only one part of the brake line is used check at the wheel's end if it freezes up when you step on the brake to check for debris or dirt blocking the fluids.
This may also still be related to the ABS system but there are a number of items that may affect the ABS not to work properly. Check the sensor that was replaced if it sends signals or current when the wheels are spun. It may just be a loose wire or bad wiring somewhere.
I would suggest to use a scanner to to connect to the diagnostic of the car. The engine's ECU and the PCM should be scanned. TRAC control is connected to the PCM and its operation affects the ABS. Engine issues may also affect the ABS as the computers in the car use sensor signals for them to work an error may affect their operation. Some shops would let you use their scanners for free. Autozone would let you borrow theirs.

Posted on May 27, 2011

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What is the code C1247 pontiac grand am 2001?


left front wheel sensor is not reading replace wheel speed sensor

Jul 13, 2014 | 2001 Pontiac Grand Am SE

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I have a 2004 Mazda MPV with some wierd brake issues. I found what appeared to be a bad caliper on front passenger side, and replaced with a new one, yet this same wheel continues to seize up. What is...


If the caliper is seizing and it is not the caliper it is the module that controls how the brake fluid is distributed. I don't have my book in front of me at the moment but when you look under teh hood on teh drivers side you will see a block that has the brake lines coming out of it. That is part of teh ABS system is one is installed and is a master brake control hub if it ABS isn't installed. being that new I would assume it was equipped with ABS. There are a couple of ways you can test if this is teh problem. If I remember correctly the MPV brakes with all 4 brakes, that means you can, as a temp test, switch the lines to see if the caliper problem changes to the different caliper. If it does then you know for a fact it is that unit and not the caliper. Also, something to consider, the caliper that is locking maybe locking because the problem is actually the caliper on the opposite side. If the caliper on the left front is stuck in the open position, on occasion that will cause too much fluid pressure to the right front giving you the impression the problem is the right side and it isn't. This is rare but certainly a possibility. As a general rule you should always replace Calipers in pairs. If you replace the right front you should replace the left front, same with the rear calipers.

Feb 15, 2011 | 2004 Mazda MPV

1 Answer

Low Trac light coming on on 1995 Monte Carlo. Can feel something in brake pedal. Making clicking sound. Safe to drive?


the traction control and the abs use the same wheel speed sensors, what you are feeling is the abs trying to release a brake because it thinks that one of the wheels is locking up, you probably have a bad wheel sensor or there could be something stuck in the relector ring like ice. try taking the car to auto-zone and have them retrieve the codes and that will tell you witch wheel to take a look at.

Jan 14, 2011 | 1995 Chevrolet Monte Carlo

1 Answer

The front left brake is doing all the braking and is heating up. brand new caliper on both sides and new rotors and pads. Had to repair yesterday because the pad on the left was sticking to the Rotor...


ABS LIGHT ON COULD BE A BAD WHEEL SENSOR CAUSING ABS UNIT LOCK UP THAT WHEEL OVERHEATING OR YOU COULD HAVE FAULT IN THE ABS UNIT.TAKE VECHICLE TO GARAGE OR DEALERSHIP.LET THEM SCAN THE ABS BRAKE SYSTEM TO SEE WHATS CAUSING ABS LIGHT TO COME ON.

Sep 23, 2010 | 1999 Oldsmobile Alero

1 Answer

Fix front wheel bearing 2001 monte carlo ss


Remove the wheel, remove the axle nut, remove the brake caliper and bracket, remove the brake disc, remove the three bolts that go through the back and hold the bearing assembly in the knuckle, disconnect the abs connector and slide the bearing assembly out. Reverse the procedure to install the new one.

Jan 07, 2010 | 2001 Chevrolet Monte Carlo

2 Answers

REPLACED ALL FRONT BRAKE PARTS. HAS ABS. PULLING


Check the flex lines that connect to the calipers. When you remove those from the old calipers and bend them, sometimes **** breaks loose inside and that will not let the fluid return to the master cylinder and will keep the brakes locked

Dec 03, 2009 | 1995 GMC Suburban

1 Answer

The abs and trac lights stay on when the engine is running. how do I fix the problem ?


Something as simple as a different tire size can cause the abs to go nuts. I even had it where the two tires were the same size. But a different brand name. Each manufacture has their own tire sizing so not all tires a equal in size. Even though it says on the side of the tire that they are the same size.

Sometimes the cooper inside the insulation of the wires going to the sensors corrodes. Especially on the front units. It reads more ohms than normal but not open and is very intermittent. However moving the wires my make it work for a while. That's why replacing bearings seems to fix the problem but it comes back after a while.

You can test the speed sensors yourself...
Front sensor specs:
956 to 1240 ohms in 41 to 110 degree weather
at least 100mV AC (NOT DC!) volts when hub is spun by hand
Rear sensor specs:
950 to 1300 ohms in 41 to 110 degree weather
At least 100mV AC (NOT DC!) volts when hub is spun by hand

Here is some information from service bulletins that could be related to the problem. The traction control, antilock brakes, and tire inflation monitor all use wheel speed sensor input.

This first bulletin seems like it could be the problem because engine movement is involved:

GM Corporate Bulletin 00-06-04-049B
This Bulletin covers a problem that can cause multiple failures, one of which is an Antilock brake problem, and covers 2000-2003 Impala and Monte Carlo built prior to 2/03.
Check to make sure the wiring harness adjacent to the AC accumulator/dryer is not rubbing against the ac accumulator chaffing through the insulation of the wires in the harness.

GM Corporate Bulletin 03-05-25-008 overview:
GM front wheel speed sensor harness replacement - 2001-2003 Buick Century, Regal; 2001-2003 Chevrolet Impala, Monte Carlo; 2001-2002 Oldsmobile Intrigue; 2001-2004 Pontiac Grand Prix
This bulletin is about inspecting the harness going to the front wheel speed sensor for wear from contact with front suspension parts.
Repair harnesses/leads are available that can be spiced onto the main harness.
2001-2003 impala & Monte Carlo – Right side - 10340313
2001-2003 impala & Monte Carlo – Left side - 10340314

SERVICE BRAKES, HYDRAULIC:ANTILOCK:ABS WARNING LIGHT
• TSB #030525008 -- INTERMITTENT/CONSTANT ANTI-LOCK BRAKING SYSTEM (ABS) MALFUNCTION INDICATOR LAMP (MIL) ILLUMINATED. *TT (NHTSA ID #10004719, OCTOBER 01 2003)

Hope helped.

Nov 05, 2009 | 2001 Chrysler Concorde

1 Answer

ABS and Traction control warning lights come on independtly and jointly. I believe the problem is the hub mounted sensor. How do I replace it.This is on a 2003 Monte Carlo SS.


hi if you know for sure it's a wheel speed sensor
remove that wheel
remove the caliper and caliper bracket
remove the brake rotor
there are 3 bolts on the other side of the knuckle(13mm)
remove them
remove the axle nut(1 5/16)
remove the hub bearing assembly(you may need to use a hammer on the hub flange)
hope this helps

May 25, 2009 | 2003 Chevrolet Monte Carlo

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