There is a brake pressure switch mounted on the ABS unit. It is a three wire sensor that needs a 5 volt reference, signal and ground. What can happen is the 5 volt reference from the module drops out and therefore the signal voltage drops out along with it. Few have replaced the brake switch itself and had the same problem. The module stops supplying the 5 volt reference to the brake pressure switch and the brake pressure switch cannot function properly. The replacement module will need to be coded after being installed.
SOURCE: bmw brake sensor
if your talking about the switch that tells when your foot is pressing in the break yea just get under there and there should be a button switch with a nut you back off then remove the switch out of the brace.
SOURCE: bmw 520i 1999 abs/asc lights on diagnostic
Check to see if your brake pads and rotors are in good condition. Or if you have replaced the pads yourself and have not reset the wheel sensors this would cause the ABS Antilock Brake System light and the ASC Automatic Stability Control light to stay on as the ASC uses the ABS brakes with computer assistance to control the car
my cigarette lighter doesn't work in the front or the back...how can i fix this? i need it to charge my cell and GPS...=/
SOURCE: Have replaced ABS module on bmw 525 E39 and ABS
ABS/ASC module is faulty
CLASSIC ABS FAILURE SYMPTOMS:
- Most of the time, the problem is the ABS module or one of the 4 wheel speed sensors (& sometimes the brake pressure sensor)
- In my 2002 BMW E39 DSC, three orange (warning) cluster display lights lit, ABS, Brake, & DSC
- The 3 warning lights reset when the ignition is turned off, only to repeatedly reappear within minutes of normal driving
- The fault is often intermittent leading you to falsely believe you've resolved the problem (proper diagnosis is important)
- Sometimes the fault only appears when the engine is hot; other times only at speeds over 40 mph
- Carsoft may erroneously show a rear speed sensor failure; but just replacing the speed sensor may make no difference.
- All the work is in correct diagnosis of the problem; parts replacement is trivial (from 1 to six bolts in a few minutes)
- Hence, this BMW E39 ABS 3-warning light DIY will concentrate on understanding and diagnosis of the problem
SOURCE: How to install front bumper cover on 2001 BMW E39
Installation
of the Molding
Take the Molding Trim whether it is
stock black or painted. Mine is black because my car is a year 2000.
Painted side moldings were done in the year 2001. Snap them into
place.
5 Installation
of the Rubber Gaskets
From the stock bumper, retrieve the upper
rubber gaskets unless you ordered new ones. Simply take a screw
driver and pry a corner off to get you started. Wash thoroughly.
NOTE which one belongs on which side.
Place the rubber gasket on the M5 Front Bumper onto
its appropriate side. Top
The M5 Bumper is now Fully Assembled!!!
Place aside where it can't be damaged.
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