Tha ABS lamp has recently been coming on on my son's 740 Turbo Wagon. All the lights come on with the ignition in the on position and goes out when we start it. As soon as I put it in drive the light comes on again and stays lit. The Haynes says there are no codes for the 90-91 so the control module has to be dignosed with multi-meter. Ugh!! I just did his front brakes including new rotors about 6 months ago. I fixed bad wiring on the rear sensor last year and it seems to be holding up. I know the sensors are the easiest thing to check. Where is the connector for the front sensors? Haynes isn't very clear where they are. Are they in the wheel well, or on the modulator under the hood?