2005 impala after instaling 4 new brake and rotors and 2 new front wheel hubs abs and trac light will come on after drivivng a few miles park it a few minutes and they will go out.sounds also like a bad bearing roaring on rear of car abs and trac light and abs light never came on before this change . could it possibly be a faulty hub asembly or plug also has alitle shake a low speed like a bad tire put 4 new tires on and still does same thing feels like it is on rear passenger side

Tools Required:

Lug Removal Tool
Impact Gun(Recommended)
Sockets.. Lots of metric sockets
Ratchets
Wrenches
Porta Power(hydraulic piston) --- THIS IS REALLY IMPORTANT... use to press hub off..
LOTS OF PATIENCE


Instructions:

1) Jack vehicle and support on jack stands.

2) Remove front tire.

3) Remove Front Brake caliper.. hang on frame using a bungee or other support
Important to not stress hose.

4) Remove brake pad support.

5) Remove 4 bolts from rear of hub.

6) Undo bolt for ABS sensorfrom frame, undo all clips holding wire.
Crawl under truckand unclip wire connector(trace wire from the ABS sensorto find it)

7) Make sure wire is unclipped from the frame and will not bind on removal of hub. (Prevents Damage of ABS sensor)

TRICKY PART: Turn the wheels so that you can use the hydraulic porta-power against where the lower control arm mountsto the front. (Turn the
wheel left). Position porta-power to be placed inside dimple of the middle of the hub. DO NOT DAMAGE ABS SENSOR...
Pump Porta-power until hub "Pops".. be extremely careful removing the hub not to damage the ABS wireat all.. It is easy to break and not notice (I did
this and had to resplice it)

9) Hub should be removed from vehicle by this point and you can remove the six bolts holding the old rotor on. Still be careful not to damage the sensor.

10) Change the rotor. (do not use impact gun to reattach.. may strip threads)

11) Installation is basically reverse of removal.

12) Install brake pads, press caliper back in (typical brake job)

13) Put tire back on.. do other side.. and you're done.


Porta Poweris this.... http://www.southern-tool.com/store/porta_power_kit.html

Is your ABS working properly? Under heavy braking the ABS should engage and 'pulse' the brakes on/off. It is normal to feel the brake petal flutter or pulse under your foot.

Under light braking there should be no pulsing as the ABS does not engage and you have changed the rotors and pads.

Removal

1. Raise and support the vehicle.
2. Remove the wheel and tire assembly.
3. Remove the brake caliper, caliper anchor, rotor and ABS wheel speed sensor.
4. Remove the cotter pin, nut retainer and axle hub nut.
5. Remove the hub/bearing mounting bolts from the back of the steering knuckle. Remove hub/bearing from the steering knuckle and off the axle shaft.

Installation

1. Install the hub/bearing to the knuckle.
2. Install the hub/bearing-to-knuckle bolts and tighten to specification.
3. Install the hub washer and nut. Tighten the hub nut to specification. Install the nut retainer and a new cotter pin.
4. Install the brake rotor, caliper anchor, caliper and ABS wheel speed sensor.
5. Install the wheel and tire assembly.
6. Remove the support and lower the vehicle.

A front brake pulsing with no ABS light is a rotor that is no longer true i.e warped. Pull off the tire and rotate the rotor. Hold a straight edge (ruler) across the outside of the rotor as your rotating the rotor. You will note that it changes distance on the straight edge / ruler as it rotates. (in out wobble) A good way to test for an out of true rotor is to drive at about 45 miles and hour and really stand on the brakes (do not lock them up) If the steering wheel and or brake pedal pulsate... you most likely have a rotor problem. If your rotor has never been "turned" it is probably time to do so.

The ABS sensor is behind the rotor on the lower control arm pointed outward toward the rotor with a flat button face. You can not see the button face with the rotor installed. If the sensor is bad you will have an ABS light. I think your troubleshooting the wrong problem. i.e rotor vs your current focus of the ABS sensor.

I would like some feed back on the running dynamic on the road brake test.

Thanks for choosing FixYa,
Kelly

brake fluid light goes on when the fluid is low. The traction control light may go on as well if the module detects a fault in the traction control system. The abs light may go on at the same time as the trac light if the wheel speed sensor is not sending a believable signal to the abs/trac module.

If one of the wheel speed sensors is faulty, or a hub is bad, that can cause the problem described.

Good luck on repairing this problem.

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.

1. Remover wheel
2. Remove brake caliper
3. Remover rotor
4. Remove 35mm Castle Nut
5. Remover 3 bolts behind strut assembly
6. UNclip any ABS sensor wires
7. Pull hub out of strut assembly but be careful not to pull CV joints out of axle

Either someone damaged a sensor for the ABS/TRAC control, or the replacement parts are not compatible with the ABS system.

WHY its a parking brake sand the rust off & install new rotor. Or pull the hub & probaly damage the wheel speed sensor & spend lots of money on new hub WISH YOU WELL

THE PROBLEM IS WITH A HUB WHEEL SPEED SENSOR OR MORE LIKELY THE HARNESS LEADING TO THE HUB.

CHECK THE RESISTANCE AT THE HUB CONNECTION, IT SHOULD BE BETWEEN 900OHMS AND 1300OHMS. THEN SWITCH TO A-C VOLTAGE, IT SHOULD BE 100MV WHEN TURNING THE WHEEL BY HAND. IF BOTH CHECK OUT THE PROBLEM IS IN THE WIRING TO THE HUB.

THE RIGHT FRONT HUB USUALLY HAS A BEND, DOWNWARD THEN UPWARD NEAR THE CONNECTOR TO THE HUB. THAT IS WHERE THE PROBLEM USUALLY OCCURS.

NEW HARNESS WIRES CAN BE BOUGHT AT THE DEALER.