Failure in ABS causes pump to run continuously and wear down battery on Subaru Legacy

A failure in the anti-lock brake system (ABS) causes the ABS pump to continuously run, which will eventually wear down the battery. An improved ABS relay is available to solve the problem.

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Average mileage: 182,666 (135,000–227,000)
9 model years affected: 1990, 1991, 1992, 1993, more1994, 1995, 1996, 1997, 1998
18 people reported this problem
3 people shared problem details
1994 Subaru Legacy205,000
I just figured this out by reading THIS, but I inadvertently fixed the issue when I unplugged the ABS unit because it was pumping air into the brake lines and leaking.
1991 Subaru Legacy189,000
ABS warning light illuminated on the dash. I googled "abs light on 1991 subaru legacy" and a link (this page) said that a common problem was the relay burning up and causes the ABS pump to run continuously (even with ignition off). Haynes manual revealed the location of the ABS relay. Replaced relay with new one. Problem fixed:)
At approximately 190000 miles my 1994 Subaru Legacy 2.2L Sedan began "eating" batteries and then alternators. This resulted in about four warranty replacements of each over a period of four years.
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