went through a puddle; abs/asr light came on immediately

went through a puddle; abs/asr light came on immediately

Car is a 1993 300ce convertible with asr. I went through a wide puddle, maybe  a little too fast, while making a left turn. Immediately after the water splashed, and my car doesn't have any undershield, the asr/abs light went on. I have changed the brake light switch, and the light stays on. Next I was going to check the brake discs and abs sensors and wires. Suggestions?
Thanks.
Richard