Margaret Brown Warner, 55, an independent management consultant and a minister of the Christian Church (Disciples of Christ), died at the Manor Care nursing home in Wheaton on Saturday of amyotrophic lateral sclerosis, also known as Lou Gehrig's disease.

Mrs. Warner was born in Titusville, Pa., and grew up in Altoona and other Pennsylvania towns where her father, the Rev. Walter E. Brown, was a minister of the Disciples of Christ. She graduated from Texas Christian University in 1951 and was ordained in the same year.

For the next five years, Mrs. Warner and her husband, the Rev. A. M. Warner, served in Japan. Mrs. Warner taught in institutions of the United Church of Christ of Japan in Tokyo and Osaka. From 1956 to 1966, she lived in New York City, where she sang in a number of church choirs.

She moved to Washington in 1966 and for about two years was a substitute teacher in the D.C. public school system. She later became a management consultant. Her clients included the Postal Service Management Institute and other organizations here and elsewhere in the country.

A resident of Washington, Mrs. Warner was a member of the choirs of the Ascension and St. Agnes Episcopal Church and of the National City Christian Church. She also was active for some years in the congregation of St. Stephen and the Incarnation Episcopal Church.

Her marriage ended in divorce.

Survivors include two daughters, Melody Hollander of Redwood City, Calif., and Kimberly Warner of Washington; two sons, Lawrence C. of Denver, Colo., and Nathan C. of Los Angeles; a sister, Shirley Galentine of Suitland, and a brother, Gerald Brown of Fairless Hills, Pa.

The family suggests that expressions of sympathy be in the form of contributions to the St. Francis Center Caring Program, 1768 Church St. NW, Washington, D.C., or to the Muscular Dystrophy Association, 1800 Mass. Ave. NW., Washington, D.C.