Its farely old ive had truck for 4500 miles give or take 500 and it looks a tad corroded, think it could just be battery output... Because i ran an altenator test and that was alright @ voltage on battery was 12.6 or 13.1 i cant remember, is that the output..? Im guessin so

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2000 Ranger XLT 2.5L 5 Speed