before doing the module, check the speed sensors - they "report" to the ABS module plug, and the pinout is somewhere on this forum... there are four sensors, one at each corners, each one is responsible for a certain function but all come to that plug... you will need a multimeter with the ability to test diodes, as those sensors are "hall effect" diodes... worst case scenario, you can use an OhmMeter - do you know how to test a diode with an OhmMeter? best case scenario, if you have an O-scope, and can turn a wheel - then you can see the square wave from the sensor...