1999 bmw 3231 abs light come on and the speedometer stop working and brake light is on?

code p 0500 and 503 both refer to the vehicle speed sensor(VSS)---circuit malfunction or intermittent/ errattic high input====causes wiring-=--VSS---ECM--wiring poor connection--other connected system---instrument panel---VSS---communication control module
to have the abs light on I would be checking the communication control module or the ECM

Youi must have the system scanned to see what codes show up to pin down the cause of this.

sounds like an abs sensor has gone at the rear ,this can knock out the speedo as well

this is a pretty common problem with abvs units. they short out. It will need to be replaced or rebuilt. modulemaster.com can rebuild this for alot less than the BMW will charge

Usually the ABS computer knows what it is doing. You may want someone to hookup a scanner to the ABS test port.
When I had my speedometer and odometer act up, it turned out to be a bad alternator. You might want to check yours.

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

Does your speedometer work ok? There is a sensor on top of your rear differential that provides a signal to both the abs and the computer(speedometer uses the signal from the computer) This sensor goes out pretty common.

I had the same problem with ABS light and speedometer, I was told that it is the transmission control module. It has not yet stopped shifting but I have had times where it just wont stay running. It will start and then stall. Hope this helps.

hello there, i have and bmw 3 series 325ia progressive 2009, and with bmw its a matter of luck to have your car well, now have you kept in touch with the bmw department where you bought it ? if you do, and they dont help you, you can send an email to the bmw of germany complaining about your problems, you have to put every single detail, since when you bought ( year, number of series etc,) and they will contact the bmw from where you bought, and im sure they will respect you and if you have look, they could even give discounts on cars. hope i helped you, good look!

It's not the fuse. You need to jump start the diagnostic cable. First you need a battery of 9v and short the + and - terminal to the diagnostic cable. Then you will see smoke. After that it should work fine.