Hello all. 1999 Grand M with 209,000 miles. My wipers only work on high. At first, they wouldn't park. Then the intermentant stopped, now the low speed stopped working. So now, they only work on high. I have been researching this and I haven't been able to locate anything solid on how to diagnose the motor or the switch (the multi function one on the steering column). Any ideas how to try and diagnose or any ideas where I should start. Or better yet, the answer to my problem . Thanks all!