I have a 2003 300a I've been chasing as abs light on. The code is for the right rear speed sensor circuit fault. After a lot of searching and investigating with a multimeter and have discovered that the abs module is not putting out the necessary 5 volts to the sensor to the right rear sensor (checked at the abs module plug). Has anybody else experienced something similar? I have a complete abs unit off another 300a on the shelf, just making sure that there isn't some other possible solution before i take the time to switch the pump out and bleed the brakes with the scan tool.