Land Rover Repair: 2003 discovery, abs light, autologic

Question
Hi, I was searching the net and I come across you, I thought may-be you can help me.
recently I bought a 2003 discovery, short time after I bought it the ABS, and the tow light come's on so I did some research and I discovered that it was the abs module so I called the dealer and it was an expansive item $1700. or so, I found the same part used for $380.00 so I purchased it and replaced the part. all the light's went out and no problem for one month then all the light's come's back on so I called in since it was under 90 day's warranty to order a different part, before I change the part again is there some thing else making the ABS light to come on
could you help me to figere this problem.
thank you in advance  

Answer
First of all, there is a $80 repair kit for that $1700 module.  You don't usually need a new one.

As to why the light is on again - there are many possible causes.  I suggest you find a dealer or workshop with a T4 or Autologic system and have the vehicle checked out.