"To The Ground!!!"

[mrfc3s]

Via Auto/Consumer Reports
Troubleshooting
- Poor transmission shift: Erratic shifting of the automatic transmission accompanied by a check-engine light is often due to a corroded battery ground connection at the engine. (1990-94)
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exactly how would I go about doing that.(where are the grounds and which do i check and how do i know if its bad AND how do i fix it?)
Im a nOOb and a nOOb to Subies and alot of cars in general. Any info would help. (i know it's a retarded question but i dont want to mess this car up, just bought it:)

[dumbskate]

i dont know but you have probably searched around by now and found your answer but if not just reply to this and i will fill you in.

chur