Social Security Disabled Widow's and Widower's Equity Act of 1989

Social Security Disabled Widow's and Widower's Equity Act of 1989 - Amends title II (Old Age, Survivors and Disability Insurance) (OASDI) of the Social Security Act to repeal the separate definition of disability applicable to widows and widowers. Permits the months of a widow's or widower's entitlement to Supplemental Security Income (SSI) benefits (title XVI of the Social Security Act) on the basis of a disability to be counted towards the 24 months needed to become entitled to hospital insurance benefits under Medicare (title XVIII of the Social Security Act) on that basis. Provides full widow's or widower's insurance benefits to disabled widows or widowers without regard to age. Amends the SSI program to preserve the Medicaid (title XIX of the Social Security Act) eligibility of disabled widows or widowers who become ineligible for SSI benefits upon the implementation of this Act's amendments making them eligible for, or increasing their, widow's or widower's insurance benefits. Amends the OASDI program to extend the time period during which a surviving spouse or a surviving divorced spouse must have initially become disabled in order to qualify for widow's or widower's insurance benefits before reaching age 60 in cases where such surviving spouse or surviving divorced spouse has quarters of coverage based on his or her own work after the death of the insured individual on whose wages such benefits are based.