ABS warning light

Hey today when i was driving my 3000gt for the first time i noticed that the ABS warning light was on and i took it to a dealer and he said i can put a new sytem in it for 3,500. i was wondering if any of you have any commets as to what elese may have caused the light to come on Thnaks for your time

could this have nything to do with it (recall fromhttp://www.alldata.com/TSB/39/92390910.html)

9235006 MAY 92 Brakes - ABS Warning Light Illumination Explaination

My ABS light comes on because one of my speed sensors is bad. Take those off and clean them up before going down the road to a complete replacement. You can tell if they are the source (most likely source) if the ABS system is not disabled when you start the car and the light doesn't come on until you're going over five mph.

no light lis always on in the maual it says if the abs relay is unplugged the light will come one so could this be a bad relay?

I can’t say with certainty, but that does seem likely.

ah i take that back today after getting back i took it for a ride and saw it came on after 5moh or so. how does it cost to get new speed sensors put on and is it easy enough where i can do it